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CISC Dept | Other CISC OER | Library

CISC 3310 Principles of Computer Architecture (Briskman)

OER Course Website for Brooklyn College's CISC 3310 Principles of Computer Architecture by Miriam Briskman

Materials for Topic 1: Intro to Computer Architecture

Gallery: The Inside of the Instructor's Previous Desktop Computer, HP TouchSmart 610

Top view of the ~25x20 cm flat green desktop computer's motherboard, featuring (right to left) two memory chips, a cpu chip, and a graphics card.

Motherboard, Top View

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The motherboard is a large board-like chip hosting multiple devices and chips that are essential for the computer's operation, such as the CPU, RAM (memory), cache, graphics cards (GPU), wires connection all these devices, and many more. Every modern desktop and laptop computer, every cell phone device, and many other devices has a motherboard. One reason for the name "motherboard" is that, just as a mother bears her children, this board bears the mentioned vital devices upon itself.

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

Another top-oblique view of the ~25x20 cm flat green motherboard, featuring (right to left) two memory chips, a cpu chip, and a graphics card.

Motherboard, Slightly Oblique

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The motherboard is a large board-like chip hosting multiple devices and chips that are essential for the computer's operation, such as the CPU, RAM (memory), cache, graphics cards (GPU), wires connection all these devices, and many more. Every modern desktop and laptop computer, every cell phone device, and many other devices has a motherboard. One reason for the name "motherboard" is that, just as a mother bears her children, this board bears the mentioned vital devices upon itself.

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

A bottom view of a desktop computer's ~25x20 cm flat green motherboard.

Motherboard, Back

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The motherboard is a large board-like chip hosting multiple devices and chips that are essential for the computer's operation, such as the CPU, RAM (memory), cache, graphics cards (GPU), wires connection all these devices, and many more. Every modern desktop and laptop computer, every cell phone device, and many other devices has a motherboard. One reason for the name "motherboard" is that, just as a mother bears her children, this board bears the mentioned vital devices upon itself.

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

An oblique-angle view of a desktop computer's green-colored motherboard, featuring (right to left) two memory chips, a cpu chip, and a graphics card.

Motherboard, Oblique-Angle View

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The motherboard is a large board-like chip hosting multiple devices and chips that are essential for the computer's operation, such as the CPU, RAM (memory), cache, graphics cards (GPU), wires connection all these devices, and many more. Every modern desktop and laptop computer, every cell phone device, and many other devices has a motherboard. One reason for the name "motherboard" is that, just as a mother bears her children, this board bears the mentioned vital devices upon itself.

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

A closeup view of the square, nearly-flat silver-colored metal cpu chip, fixed inside its closed case on the computer's motherboard.

Closeup of the CPU on the Motherboard

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The CPU (= Central Processing Unit), also referred to sometimes as the processor or microprocessor, is the brain of the computer that calculates things (e.g., adding numbers, extracting the first letter of a string, etc.) makes decisions (e.g., decides whether to add a number or subtract it, depending on a given condition such as via an IF-ELSE statement), and, in general, runs a program's instructions. Note that the computer's Operating System, e.g., Windows, is itself a program (more accurately: software,) so the CPU is necessary for your computer to work at all times! A CPU might contain multiple cores, each of which can perform computations and execute instructions independently and in parallel to the other cores. A quad-core CPU, for example, contains 4 cores that can run 4 programs in parallel. The CPU shown in this image, Intel Core i5-2300, is such a quad-core CPU.

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

A closeup of the right-hand memory compartment on the computer's motherboard, showing a blue, rectangular, and flat memory chip (2GB) already inside.

Closeup of Right-Hand Side Memory (RAM) Compartment, with a Blue-Colored 2GB Memory Chip Inserted

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

DescriptionMain Memory, also known as RAM (= Random Access Memory), or simply "memory", is a device whose purpose is to store the values of variables, arrays, and objects, as well as all the currently running programs' instructions. Every program is built up of instructions, and every program uses variables (such as the arguments and return value from the main() function), which means every program resorts to storing data in memory during its execution. Note again that the Operating System is itself a program, which means that, while your device is turned on, there is always some data stored in RAM. Memory is a volatile device: once the computer is turned off, the data in it is deleted (since, while the computer is off, no program runs on it.) This means that, if, for instance, you added text into a Word file, but forgot to save it, all your data will be deleted (unless Word's autosave feature is turned on and unless your device is sophisticated enough to save your data moments before shutting off, such as in some cases of a power outage.)

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

A closeup of the left-hand memory compartment on the computer's motherboard, showing a green, rectangular, and flat memory chip (4GB) already inside.

Closeup of Left-Hand Side Memory (RAM) Compartment, with a Green-Colored 4GB Memory Chip Inserted

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

DescriptionMain Memory, also known as RAM (= Random Access Memory), or simply "memory", is a device whose purpose is to store the values of variables, arrays, and objects, as well as all the currently running programs' instructions. Every program is built up of instructions, and every program uses variables (such as the arguments and return value from the main() function), which means every program resorts to storing data in memory during its execution. Note again that the Operating System is itself a program, which means that, while your device is turned on, there is always some data stored in RAM. Memory is a volatile device: once the computer is turned off, the data in it is deleted (since, while the computer is off, no program runs on it.) This means that, if, for instance, you added text into a Word file, but forgot to save it, all your data will be deleted (unless Word's autosave feature is turned on and unless your device is sophisticated enough to save your data moments before shutting off, such as in some cases of a power outage.)

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

A closeup view of the computer's red-colored, nearly square, flat AMD graphics card/chip.

Closeup of the AMD Graphics Card (Red) Installed on the Motherboard

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The CPU (= Central Processing Unit), also referred to sometimes as the processor or microprocessor, is the brain of the computer that calculates things (e.g., adding numbers, extracting the first letter of a string, etc.) makes decisions (e.g., decides whether to add a number or subtract it, depending on a given condition such as via an IF-ELSE statement), and, in general, runs a program's instructions. Note that the computer's Operating System, e.g., Windows, is itself a program (more accurately: software,) so the CPU is necessary for your computer to work at all times! A CPU might contain multiple cores, each of which can perform computations and execute instructions independently and in parallel to the other cores. A quad-core CPU, for example, contains 4 cores that can run 4 programs in parallel. The CPU shown in this image, Intel Core i5-2300, is such a quad-core CPU.

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

An oblique view of the cpu's metal case opened.

CPU Case is Open, Oblique

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The CPU (= Central Processing Unit), also referred to sometimes as the processor or microprocessor, is the brain of the computer that calculates things (e.g., adding numbers, extracting the first letter of a string, etc.) makes decisions (e.g., decides whether to add a number or subtract it, depending on a given condition such as via an IF-ELSE statement), and, in general, runs a program's instructions. Note that the computer's Operating System, e.g., Windows, is itself a program (more accurately: software,) so the CPU is necessary for your computer to work at all times! A CPU might contain multiple cores, each of which can perform computations and execute instructions independently and in parallel to the other cores. A quad-core CPU, for example, contains 4 cores that can run 4 programs in parallel. The CPU shown in this image, Intel Core i5-2300, is such a quad-core CPU.

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

An oblique view of the cpu's metal case opened: the cpu was removed, and tiny copper pins protrude upwards where the CPU lied.

CPU Case is Open, and the CPU was Removed, Oblique

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The CPU (= Central Processing Unit), also referred to sometimes as the processor or microprocessor, is the brain of the computer that calculates things (e.g., adding numbers, extracting the first letter of a string, etc.) makes decisions (e.g., decides whether to add a number or subtract it, depending on a given condition such as via an IF-ELSE statement), and, in general, runs a program's instructions. Note that the computer's Operating System, e.g., Windows, is itself a program (more accurately: software,) so the CPU is necessary for your computer to work at all times! A CPU might contain multiple cores, each of which can perform computations and execute instructions independently and in parallel to the other cores. A quad-core CPU, for example, contains 4 cores that can run 4 programs in parallel. The CPU shown in this image, Intel Core i5-2300, is such a quad-core CPU.

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

A top view of the square, nearly-flat silver-colored metal cpu chip: Intel Core i5-2300, 2.80GHZ, Made in Costa Rica.

The CPU chip, Top (Outer) View

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The CPU (= Central Processing Unit), also referred to sometimes as the processor or microprocessor, is the brain of the computer that calculates things (e.g., adding numbers, extracting the first letter of a string, etc.) makes decisions (e.g., decides whether to add a number or subtract it, depending on a given condition such as via an IF-ELSE statement), and, in general, runs a program's instructions. Note that the computer's Operating System, e.g., Windows, is itself a program (more accurately: software,) so the CPU is necessary for your computer to work at all times! A CPU might contain multiple cores, each of which can perform computations and execute instructions independently and in parallel to the other cores. A quad-core CPU, for example, contains 4 cores that can run 4 programs in parallel. The CPU shown in this image, Intel Core i5-2300, is such a quad-core CPU.

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

A bottom (inner) view of the square, nearly-flat silver-colored metal cpu chip: the small copper touchpoints all across this surface are visible.

The CPU chip, Bottom (Inner) View

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The CPU (= Central Processing Unit), also referred to sometimes as the processor or microprocessor, is the brain of the computer that calculates things (e.g., adding numbers, extracting the first letter of a string, etc.) makes decisions (e.g., decides whether to add a number or subtract it, depending on a given condition such as via an IF-ELSE statement), and, in general, runs a program's instructions. Note that the computer's Operating System, e.g., Windows, is itself a program (more accurately: software,) so the CPU is necessary for your computer to work at all times! A CPU might contain multiple cores, each of which can perform computations and execute instructions independently and in parallel to the other cores. A quad-core CPU, for example, contains 4 cores that can run 4 programs in parallel. The CPU shown in this image, Intel Core i5-2300, is such a quad-core CPU.

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

The front of the blue, rectangular, and flat 2GB memory module. Elipda, Taiwan. 2GB 2Rx8 PC3-10600S-9-10-F1.

The Blue 2GB Memory Chip, Front

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

DescriptionMain Memory, also known as RAM (= Random Access Memory), or simply "memory", is a device whose purpose is to store the values of variables, arrays, and objects, as well as all the currently running programs' instructions. Every program is built up of instructions, and every program uses variables (such as the arguments and return value from the main() function), which means every program resorts to storing data in memory during its execution. Note again that the Operating System is itself a program, which means that, while your device is turned on, there is always some data stored in RAM. Memory is a volatile device: once the computer is turned off, the data in it is deleted (since, while the computer is off, no program runs on it.) This means that, if, for instance, you added text into a Word file, but forgot to save it, all your data will be deleted (unless Word's autosave feature is turned on and unless your device is sophisticated enough to save your data moments before shutting off, such as in some cases of a power outage.)

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

The back of the blue, rectangular, and flat 2GB memory module.

The Blue 2GB Memory Chip, Back

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

DescriptionMain Memory, also known as RAM (= Random Access Memory), or simply "memory", is a device whose purpose is to store the values of variables, arrays, and objects, as well as all the currently running programs' instructions. Every program is built up of instructions, and every program uses variables (such as the arguments and return value from the main() function), which means every program resorts to storing data in memory during its execution. Note again that the Operating System is itself a program, which means that, while your device is turned on, there is always some data stored in RAM. Memory is a volatile device: once the computer is turned off, the data in it is deleted (since, while the computer is off, no program runs on it.) This means that, if, for instance, you added text into a Word file, but forgot to save it, all your data will be deleted (unless Word's autosave feature is turned on and unless your device is sophisticated enough to save your data moments before shutting off, such as in some cases of a power outage.)

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

The front of the green, rectangular, and flat 4GB memory module. Samsung, China. 4GB 2Rx8 PC3-10600S-9-10-F2

The Green 4GB Memory Chip, Front

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

DescriptionMain Memory, also known as RAM (= Random Access Memory), or simply "memory", is a device whose purpose is to store the values of variables, arrays, and objects, as well as all the currently running programs' instructions. Every program is built up of instructions, and every program uses variables (such as the arguments and return value from the main() function), which means every program resorts to storing data in memory during its execution. Note again that the Operating System is itself a program, which means that, while your device is turned on, there is always some data stored in RAM. Memory is a volatile device: once the computer is turned off, the data in it is deleted (since, while the computer is off, no program runs on it.) This means that, if, for instance, you added text into a Word file, but forgot to save it, all your data will be deleted (unless Word's autosave feature is turned on and unless your device is sophisticated enough to save your data moments before shutting off, such as in some cases of a power outage.)

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

The back of the green, rectangular, and flat 4GB memory module.

The Green 4GB Memory Chip, Back

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

DescriptionMain Memory, also known as RAM (= Random Access Memory), or simply "memory", is a device whose purpose is to store the values of variables, arrays, and objects, as well as all the currently running programs' instructions. Every program is built up of instructions, and every program uses variables (such as the arguments and return value from the main() function), which means every program resorts to storing data in memory during its execution. Note again that the Operating System is itself a program, which means that, while your device is turned on, there is always some data stored in RAM. Memory is a volatile device: once the computer is turned off, the data in it is deleted (since, while the computer is off, no program runs on it.) This means that, if, for instance, you added text into a Word file, but forgot to save it, all your data will be deleted (unless Word's autosave feature is turned on and unless your device is sophisticated enough to save your data moments before shutting off, such as in some cases of a power outage.)

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

The cpu fan enclosed in a black, plastic shell. Yellow and red thin wires are protruding from the center of the fan.

The CPU Fan (= Ventilator), Front

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The CPU's fan and the heatsink work combinedly to drive heat away from your device's CPU. While running instructions or calculating things, the CPU's temperature increases because electric currents flow through the CPU and, some of the energy from this electricity turns into heat. Since a CPU runs millions, if not billions, of instructions per second, heat builds up in the CPU. The problem is that the performance of a hot CPU decreases, so heat must be removed away from the CPU. To achieve this, a fan is installed right on top of the CPU inside the computer. As a result, hot air near the CPU is pushed away towards the heatsink (which contains air passages called fins through which hot air can escape) and outside of the computer, being exchanged with cooler air, which cools the CPU. The humming sound you sometimes hear inside your computer, especially when you run a heavy program such as a game, is the CPU fan, whose rotation speed is increased to drive heat away from your hardworking CPU!

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

A closeup of the label on the front center of the fan: DC Brushless, Model KUC1012D. DC12V, 0.75A, -9K80. Delta Electronics, China.

The CPU Fan (= Ventilator): Closeup on the Fan's Label, Front

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The CPU's fan and the heatsink work combinedly to drive heat away from your device's CPU. While running instructions or calculating things, the CPU's temperature increases because electric currents flow through the CPU and, some of the energy from this electricity turns into heat. Since a CPU runs millions, if not billions, of instructions per second, heat builds up in the CPU. The problem is that the performance of a hot CPU decreases, so heat must be removed away from the CPU. To achieve this, a fan is installed right on top of the CPU inside the computer. As a result, hot air near the CPU is pushed away towards the heatsink (which contains air passages called fins through which hot air can escape) and outside of the computer, being exchanged with cooler air, which cools the CPU. The humming sound you sometimes hear inside your computer, especially when you run a heavy program such as a game, is the CPU fan, whose rotation speed is increased to drive heat away from your hardworking CPU!

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

The back of the cpu fan. The back is a gray colored plastic panel. A white sticker with a barcode is at the bottom-left of this panel.

The CPU Fan (= Ventilator), Back

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The CPU's fan and the heatsink work combinedly to drive heat away from your device's CPU. While running instructions or calculating things, the CPU's temperature increases because electric currents flow through the CPU and, some of the energy from this electricity turns into heat. Since a CPU runs millions, if not billions, of instructions per second, heat builds up in the CPU. The problem is that the performance of a hot CPU decreases, so heat must be removed away from the CPU. To achieve this, a fan is installed right on top of the CPU inside the computer. As a result, hot air near the CPU is pushed away towards the heatsink (which contains air passages called fins through which hot air can escape) and outside of the computer, being exchanged with cooler air, which cools the CPU. The humming sound you sometimes hear inside your computer, especially when you run a heavy program such as a game, is the CPU fan, whose rotation speed is increased to drive heat away from your hardworking CPU!

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

The triangular, prolonged, metal heatsink. All the 3 sides/panels of the heatsink have multiple, parallel, openings, like those of a tower fan.

Heatsink, Top-Right Side

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The CPU's fan and the heatsink work combinedly to drive heat away from your device's CPU. While running instructions or calculating things, the CPU's temperature increases because electric currents flow through the CPU and, some of the energy from this electricity turns into heat. Since a CPU runs millions, if not billions, of instructions per second, heat builds up in the CPU. The problem is that the performance of a hot CPU decreases, so heat must be removed away from the CPU. To achieve this, a fan is installed right on top of the CPU inside the computer. As a result, hot air near the CPU is pushed away towards the heatsink (which contains air passages called fins through which hot air can escape) and outside of the computer, being exchanged with cooler air, which cools the CPU. The humming sound you sometimes hear inside your computer, especially when you run a heavy program such as a game, is the CPU fan, whose rotation speed is increased to drive heat away from your hardworking CPU!

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

The triangular, prolonged, metal heatsink. All the 3 sides/panels of the heatsink have multiple, parallel, openings, like those of a tower fan.

Heatsink, Bottom Side

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The CPU's fan and the heatsink work combinedly to drive heat away from your device's CPU. While running instructions or calculating things, the CPU's temperature increases because electric currents flow through the CPU and, some of the energy from this electricity turns into heat. Since a CPU runs millions, if not billions, of instructions per second, heat builds up in the CPU. The problem is that the performance of a hot CPU decreases, so heat must be removed away from the CPU. To achieve this, a fan is installed right on top of the CPU inside the computer. As a result, hot air near the CPU is pushed away towards the heatsink (which contains air passages called fins through which hot air can escape) and outside of the computer, being exchanged with cooler air, which cools the CPU. The humming sound you sometimes hear inside your computer, especially when you run a heavy program such as a game, is the CPU fan, whose rotation speed is increased to drive heat away from your hardworking CPU!

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

The triangular, prolonged, metal heatsink. All the 3 sides/panels of the heatsink have multiple, parallel, openings, like those of a tower fan.

Heatsink, Top-Right and Bottom Sides, Oblique

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The CPU's fan and the heatsink work combinedly to drive heat away from your device's CPU. While running instructions or calculating things, the CPU's temperature increases because electric currents flow through the CPU and, some of the energy from this electricity turns into heat. Since a CPU runs millions, if not billions, of instructions per second, heat builds up in the CPU. The problem is that the performance of a hot CPU decreases, so heat must be removed away from the CPU. To achieve this, a fan is installed right on top of the CPU inside the computer. As a result, hot air near the CPU is pushed away towards the heatsink (which contains air passages called fins through which hot air can escape) and outside of the computer, being exchanged with cooler air, which cools the CPU. The humming sound you sometimes hear inside your computer, especially when you run a heavy program such as a game, is the CPU fan, whose rotation speed is increased to drive heat away from your hardworking CPU!

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

The triangular, prolonged, metal heatsink. All the 3 sides/panels of the heatsink have multiple, parallel, openings, like those of a tower fan.

Heatsink, Top-Right and Bottom Sides, Angle View

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The CPU's fan and the heatsink work combinedly to drive heat away from your device's CPU. While running instructions or calculating things, the CPU's temperature increases because electric currents flow through the CPU and, some of the energy from this electricity turns into heat. Since a CPU runs millions, if not billions, of instructions per second, heat builds up in the CPU. The problem is that the performance of a hot CPU decreases, so heat must be removed away from the CPU. To achieve this, a fan is installed right on top of the CPU inside the computer. As a result, hot air near the CPU is pushed away towards the heatsink (which contains air passages called fins through which hot air can escape) and outside of the computer, being exchanged with cooler air, which cools the CPU. The humming sound you sometimes hear inside your computer, especially when you run a heavy program such as a game, is the CPU fan, whose rotation speed is increased to drive heat away from your hardworking CPU!

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

The triangular, prolonged, metal heatsink. All the 3 sides/panels of the heatsink have multiple, parallel, openings, like those of a tower fan.

Heatsink, Top-Left and Bottom Sides, Angle View

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The CPU's fan and the heatsink work combinedly to drive heat away from your device's CPU. While running instructions or calculating things, the CPU's temperature increases because electric currents flow through the CPU and, some of the energy from this electricity turns into heat. Since a CPU runs millions, if not billions, of instructions per second, heat builds up in the CPU. The problem is that the performance of a hot CPU decreases, so heat must be removed away from the CPU. To achieve this, a fan is installed right on top of the CPU inside the computer. As a result, hot air near the CPU is pushed away towards the heatsink (which contains air passages called fins through which hot air can escape) and outside of the computer, being exchanged with cooler air, which cools the CPU. The humming sound you sometimes hear inside your computer, especially when you run a heavy program such as a game, is the CPU fan, whose rotation speed is increased to drive heat away from your hardworking CPU!

Note: Images in this gallery transition (change) every 5 seconds. If you wish to look at an image for a longer time, zoom into it, or download it, you can click on an image to open it in a new tab.

The triangular, prolonged, metal heatsink. All the 3 sides/panels of the heatsink have multiple, parallel, openings, like those of a tower fan.

Heatsink, Top-Left Side

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The CPU's fan and the heatsink work combinedly to drive heat away from your device's CPU. While running instructions or calculating things, the CPU's temperature increases because electric currents flow through the CPU and, some of the energy from this electricity turns into heat. Since a CPU runs millions, if not billions, of instructions per second, heat builds up in the CPU. The problem is that the performance of a hot CPU decreases, so heat must be removed away from the CPU. To achieve this, a fan is installed right on top of the CPU inside the computer. As a result, hot air near the CPU is pushed away towards the heatsink (which contains air passages called fins through which hot air can escape) and outside of the computer, being exchanged with cooler air, which cools the CPU. The humming sound you sometimes hear inside your computer, especially when you run a heavy program such as a game, is the CPU fan, whose rotation speed is increased to drive heat away from your hardworking CPU!

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The front of a rectangular, metal-cased Hard Disk Drive box. Western Digital, WD1600AAJs, 160GB, 3.5'' long, Thailand.

Hard Disk Drive, 160GB, 3.5'' Long, Front.

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The disk (also known as secondary memory and secondary storage,) is a device whose purpose is to store your device's files and configuration info. By files we mean not only documents you work with (e.g., Notepad text files, Word, etc.,) but also system files, which are files in which your device's Operating System stores information that is critical for the correct work of your device. Unlike main memory, secondary storage devices aren't erased when the computer shuts down (otherwise, you working on a course project over a period of time wouldn't have been possible!) Usually, the capacity of a disk is much greater than that of RAM (for comparison, a typical RAM chip can contain 2, 4, or 8 Gigabytes (= 1 billion bytes = 1,000,000,000 bytes) of data, while secondary memory devices can host tens of Terabytes (= a million million = 1,000,000,000,000 bytes) of data! We will explain why making the main memory that large might make the computer inefficient. Secondary storage devices, like the hard disk drive in the image, aren't a part of the motherboard; they are installed inside the device but at a distance from the motherboard. Secondary storage devices connect to the motherboard via cables. One such technology connecting a disk to the motherboard is SATA (= Serial Advanced Technology Attachment,) which the disk in the image happens to use.

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The back of the rectangular, metal-cased Hard Disk Drive box. The back is a black, plastic panel. On top installed is a green chip.

Hard Disk Drive, 160GB, 3.5'' Long, Back.

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The disk (also known as secondary memory and secondary storage,) is a device whose purpose is to store your device's files and configuration info. By files we mean not only documents you work with (e.g., Notepad text files, Word, etc.,) but also system files, which are files in which your device's Operating System stores information that is critical for the correct work of your device. Unlike main memory, secondary storage devices aren't erased when the computer shuts down (otherwise, you working on a course project over a period of time wouldn't have been possible!) Usually, the capacity of a disk is much greater than that of RAM (for comparison, a typical RAM chip can contain 2, 4, or 8 Gigabytes (= 1 billion bytes = 1,000,000,000 bytes) of data, while secondary memory devices can host tens of Terabytes (= a million million = 1,000,000,000,000 bytes) of data! We will explain why making the main memory that large might make the computer inefficient. Secondary storage devices, like the hard disk drive in the image, aren't a part of the motherboard; they are installed inside the device but at a distance from the motherboard. Secondary storage devices connect to the motherboard via cables. One such technology connecting a disk to the motherboard is SATA (= Serial Advanced Technology Attachment,) which the disk in the image happens to use.

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A closeup view of the hard disk's green chip at the back. A white sticker at the middle of the chip includes a barcode and a code.

Hard Disk Drive, 160GB, 3.5'' Long, Closeup at the Label on the Back.

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The disk (also known as secondary memory and secondary storage,) is a device whose purpose is to store your device's files and configuration info. By files we mean not only documents you work with (e.g., Notepad text files, Word, etc.,) but also system files, which are files in which your device's Operating System stores information that is critical for the correct work of your device. Unlike main memory, secondary storage devices aren't erased when the computer shuts down (otherwise, you working on a course project over a period of time wouldn't have been possible!) Usually, the capacity of a disk is much greater than that of RAM (for comparison, a typical RAM chip can contain 2, 4, or 8 Gigabytes (= 1 billion bytes = 1,000,000,000 bytes) of data, while secondary memory devices can host tens of Terabytes (= a million million = 1,000,000,000,000 bytes) of data! We will explain why making the main memory that large might make the computer inefficient. Secondary storage devices, like the hard disk drive in the image, aren't a part of the motherboard; they are installed inside the device but at a distance from the motherboard. Secondary storage devices connect to the motherboard via cables. One such technology connecting a disk to the motherboard is SATA (= Serial Advanced Technology Attachment,) which the disk in the image happens to use.

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Oblique view of the ports at the bottom the disk: power (left) and data (SATA, right).

Hard Disk Drive, 160GB, 3.5'' Long: Power (left) and SATA (Data) (right) Ports, Oblique.

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The disk (also known as secondary memory and secondary storage,) is a device whose purpose is to store your device's files and configuration info. By files we mean not only documents you work with (e.g., Notepad text files, Word, etc.,) but also system files, which are files in which your device's Operating System stores information that is critical for the correct work of your device. Unlike main memory, secondary storage devices aren't erased when the computer shuts down (otherwise, you working on a course project over a period of time wouldn't have been possible!) Usually, the capacity of a disk is much greater than that of RAM (for comparison, a typical RAM chip can contain 2, 4, or 8 Gigabytes (= 1 billion bytes = 1,000,000,000 bytes) of data, while secondary memory devices can host tens of Terabytes (= a million million = 1,000,000,000,000 bytes) of data! We will explain why making the main memory that large might make the computer inefficient. Secondary storage devices, like the hard disk drive in the image, aren't a part of the motherboard; they are installed inside the device but at a distance from the motherboard. Secondary storage devices connect to the motherboard via cables. One such technology connecting a disk to the motherboard is SATA (= Serial Advanced Technology Attachment,) which the disk in the image happens to use.

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Top view of the bottom the disk: data (SATA) port.

Hard Disk Drive, 160GB, 3.5'' Long: SATA (Data) Port, Top-View.

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The disk (also known as secondary memory and secondary storage,) is a device whose purpose is to store your device's files and configuration info. By files we mean not only documents you work with (e.g., Notepad text files, Word, etc.,) but also system files, which are files in which your device's Operating System stores information that is critical for the correct work of your device. Unlike main memory, secondary storage devices aren't erased when the computer shuts down (otherwise, you working on a course project over a period of time wouldn't have been possible!) Usually, the capacity of a disk is much greater than that of RAM (for comparison, a typical RAM chip can contain 2, 4, or 8 Gigabytes (= 1 billion bytes = 1,000,000,000 bytes) of data, while secondary memory devices can host tens of Terabytes (= a million million = 1,000,000,000,000 bytes) of data! We will explain why making the main memory that large might make the computer inefficient. Secondary storage devices, like the hard disk drive in the image, aren't a part of the motherboard; they are installed inside the device but at a distance from the motherboard. Secondary storage devices connect to the motherboard via cables. One such technology connecting a disk to the motherboard is SATA (= Serial Advanced Technology Attachment,) which the disk in the image happens to use.

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The mostly square, flat, metal CD Drive, Front. A square, white sticker is attached. DVD Writer, Model TS-T633, HP, Philippines.

CD Drive, Front

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The CD drive or CD reader is a device that reads data from CDs (= compact disk) and DVDs (= digital optical disk) and sends this data for the CPU to process. CDs and DVDs are another type of secondary storage devices, but ones that are portable: you can carry them from place to place, unlike a computer's hard disk drive, which is non-portable and always sits inside your computer. while some computers have CD drives built into them, others don't, in which case you might want to buy a portable CD drive, which you can connect to your computer via a USB cable. Another example of a portable secondary storage device is a USB flash drive (a.k.a., a USB stick.)

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The mostly square, flat, metal CD Drive, Back.

CD Drive, Back

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The CD drive or CD reader is a device that reads data from CDs (= compact disk) and DVDs (= digital optical disk) and sends this data for the CPU to process. CDs and DVDs are another type of secondary storage devices, but ones that are portable: you can carry them from place to place, unlike a computer's hard disk drive, which is non-portable and always sits inside your computer. while some computers have CD drives built into them, others don't, in which case you might want to buy a portable CD drive, which you can connect to your computer via a USB cable. Another example of a portable secondary storage device is a USB flash drive (a.k.a., a USB stick.)

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An oblique view of the CD drive, showing the long, narrow CD insertion area.

CD Drive, CD Insertion Area, Oblique

This image taken on 8 July, 2024 by Miriam Briskman is licensed under CC BY-NC 4.0: Attribution-NonCommercial 4.0 International.

Description: The CD drive or CD reader is a device that reads data from CDs (= compact disk) and DVDs (= digital optical disk) and sends this data for the CPU to process. CDs and DVDs are another type of secondary storage devices, but ones that are portable: you can carry them from place to place, unlike a computer's hard disk drive, which is non-portable and always sits inside your computer. while some computers have CD drives built into them, others don't, in which case you might want to buy a portable CD drive, which you can connect to your computer via a USB cable. Another example of a portable secondary storage device is a USB flash drive (a.k.a., a USB stick.)

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Videos on Topic 1: Intro to Computer Architecture

"Introduction to Computer Organization and Architecture (COA)" by Neso Academy

YouTube URL: https://www.youtube.com/watch?v=Ol8D69VKX2k

Citation: Upadhyay, Rishav. "Introduction to Computer Organization and Architecture (COA)." YouTube, Neso Academy, 18 Apr. 2021.
URL: www.youtube.com/watch?v=Ol8D69VKX2k

"Basics of Computer Architecture" by Neso Academy

YouTube URL: https://www.youtube.com/watch?v=GRInNLx3Tug

Citation: Upadhyay, Rishav. "Basics of Computer Architecture." YouTube, Neso Academy, 20 Apr. 2021.
URL: www.youtube.com/watch?v=GRInNLx3Tug

"Computer Organization and Architecture Lesson 1 - Introduction" by James Kirsch

YouTube URL: https://www.youtube.com/watch?v=t6_yhVTDfUE

Citation: Kirsch, James. "Computer Organization and Architecture Lesson 1 - Introduction." YouTube, 18 Dec. 2014.
URL: www.youtube.com/watch?v=t6_yhVTDfUE

"Computer Organization and Architecture Lesson 2 - Why Learn?" by James Kirsch

YouTube URL: https://www.youtube.com/watch?v=K_21dNxKC4o

Citation: Kirsch, James. "Computer Organization and Architecture Lesson 2 - Why Learn?" YouTube, 18 Dec. 2014.
URL: www.youtube.com/watch?v=K_21dNxKC4o

"Intro to Computer Architecture" by KarBytes CS

YouTube URL: https://www.youtube.com/watch?v=HEjPop-aK_w

Citation: KarBytes CS. "Intro to Computer Architecture." YouTube, 2011. License: CC BY: Attribution.
URL: www.youtube.com/watch?v=HEjPop-aK_w

"Computer Basics: Inside a Computer" by GCFLearnFree

YouTube URL: https://www.youtube.com/watch?v=HB4I2CgkcCo

Citation: GCFLearnFree. "Computer Basics: Inside a Computer." YouTube, 3 Sep. 2020.
URL: www.youtube.com/watch?v=HB4I2CgkcCo