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How do computers work?

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2017-03-01 12:00:33

How do computers work?

There are many components in a computer. In order to understand

how a computer works, one must know the basic components. Open the

case and look at all the gizmos. There are 4 basic parts to a

computer (PC): CPU- Central Processing Unit GPU- Graphics

Processing Unit PSU- Power Supply Unit Memory- Temporarily stores

data from the hard disks Without these components, the computer

will not function normally.

There are other devices that can be attached to the PC. CDROMs,

Hard Disks, Floppy Disks, Sound Cards, TV tuner cards, mice,

keyboards, NICs (network interface card), and USB cards. The

devices are not needed to make the PC run.

Let's trace a packet of data from power on to it's final

destination, the monitor. First, the packet is stored on the hard

disk. It goes from the hard disk through the ribbon cable, which

connects the hard disk to the motherboard, then to the memory. From

the memory, it travels through the FSB (Front Side Bus) to the

cache on the CPU. There, it waits until it is needed by the CPU.

When it's needed, it goes to the GPU which in turn generates an

image that goes to the monitor. Seem like a lot? Computers are not

simple, ever.


This is an old video, but it is pretty good:

http://www.youtube.com/watch?v=DVgOMRUNXsg

Also, this article is very good:

http://computer.howstuffworks.com/how-computers-are-made2.htm


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