CPU messy knowledge

Simply remember the knowledge of CPU ......

Private Kitchen from laruence ..........

Frequency: the number of times the CPU runs per second. For example, the CPU frequency of Intel's Core 2 Duo model e8400 is 3.0 GHz, indicating that the CPU can be X 10 ^ 9 times in one second, and a few commands can be executed each time.

External frequency: the speed at which the CPU and external components transmit/calculate data.

Multiplier: a multiple of the CPUs used internally to accelerate the performance. Multiplying the two is the CPU frequency.

Intel's Core 2 Duo model e8400 has a CPU frequency of 3.0 GHz, while the external frequency is 333 MHz. Therefore, the frequency doubling is 9 times (3.0g = 333mx9, where 1G = 1000 m)

North Bridge and South Bridge:

The Northbridge bus becomes the system bus, because it is the main new in memory transmission, so the speed is faster;

Nanqiao is the so-called Input and Output bus, which is mainly used for interface devices such as hard disks, USB, and NICs;

32-bit and 64-bit

The number of digits in a computer refers to the maximum number of digits that the CPU can process at a time.

32-bit: The 32-bit computer's CPU can process up to 32-bit data at a time

64-bit: that is, the processor can run 64-bit data at a time.

CPU level (i386, i586, i686, x86_64)

This is widely used in Linux. This is not the case in windows.

The CPU in Intel Pentium MMX and AMD K6 is called i586, while the 32-bit CPU after intel celon and AMD athlon (K7) is called i686. Currently, 64-bit is called x86_64.

If the program is famous for 686 CPU usage, do not install it on a computer of a level lower than 586; otherwise, the software cannot be executed.

However, 686 of software can be installed on 386 of machines, that is, it has the ability to be backward compatible.

This article is from the "rong Miao" blog, please be sure to keep this source http://smallc.blog.51cto.com/926344/1533019