Check out the computer

The computer is composed of five core components, the five core components are input equipment, output equipment, arithmetic unit and control unit, storage equipment, the five components.

Input devices include touch version, keyboard, mouse, card reader, scanner, handwriting board and so on.

Output devices include monitors, printers, screens, projectors, etc.

Arithmetic units and controllers are also called CPUs.

Storage devices include memory (RAM), ROM (read-only memory), Flash (Flash), hard disk (harddisk), floppy disk (floppy), DVD, etc.

How the computer works first the computer receives the job from the input device and then puts it into memory, then the controller in the CPU reads the operation into the Operation unit, and the final task is transferred to the memory through the controller, and the output from the output device is present.

The type of CPU, divided into two kinds of simplified instruction set (RISC) and complex instruction set (CISC)

RISC instruction set micro-instructions are more concise, each instruction completes the time is short, and each instruction executes the action is very simple. Arm is part of the streamlined instruction set.

CISC instruction set the number of micro-instructions and complex, each command to complete a longer period of time. Each instruction executes a richer range of actions. Intel and AMD belong to complex instruction sets.

The computer is not only the five kinds of devices, but also some expansion devices, such as sound card, network card, video card and so on.

Unit of measure (capacity Unit and Speed unit) in the computer

A capacity unit is a computer that only recognizes 0 and 12 digits, so the capacity of the computer is measured with a bit. Since characters are represented in bytes, there is a byte =8bit, but a byte is not large enough, so there is kb=1024byte.

Import System	K	M	G	T	P
Two-bit	1024	1024K	1024M	1024G	1024T
Ten-bit	1000	1000K	1000M	1000G	1000T

Speed unit refers to the computer running speed and download speed, usually said the network is 4m,8m network, in fact, refers to 4Mbps (BIT/S), in fact, the download speed is 512kbyte. The operating speed is MHz and GHz.

The CPU and memory and peripherals in the computer are connected by two bridges, which are the South Bridge and the North bridges, and are close to the CPU, which are connected to the storage and external devices. Such as:

How to see cpu,cpu on the main frequency 3GHZ, this refers to the number of times per second can be done, 3GHZ per second to perform 3.0x109 work, each work mainly refers to the computer running instructions.

CPU FSB and octave, FSB refers to the speed of the computer and external devices to transmit data, octave refers to the frequency used to accelerate the CPU. frequency = FSB x octave. The FSB is 333MHZ and the octave is 9.

Because 3GHZ=333MHZX9.

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