The difference between the Quad core eight threads and the four core

　　Q: What is the difference between the I7 four core four thread I7 four cores eight threads? That's what I'm looking at. The I7 processor is written with four core eight threads, and AMD has only four cores on it, and I want to know what the difference is? Which performance is better?

4 Core 4 lines that means the CPU has 4 physical cores, so the task Manager shows 4 CPU charts

　　Eight threads, can have 2 kinds of cases, physical 4 cores and physical 8 cores

The 8 nuclear 8 line and the previous 4 core 4 lines, 4 core 8 line that is, using Hyper-threading technology, a physical core, simulation into 2 logical core, so Task Manager will display 8 CPU table

Hyper-Threading technology allows the (P4) processor to increase the bare-crystal area by 5% in exchange for 15%~30% performance improvements. In practice, however, hyper-threading can degrade performance in some programs, or in programs that are not compiled for multithreading.

In addition, Hyper-Threading technology also needs the cooperation of the operating system, the common support multiprocessor technology system may not be able to give full play to the technology.

For example, in Windows 2000, Intel does not encourage users to use Hyper-threading in this system. Windows XP Home Edition, which originally did not support multiple cores, supports hyper-threading technology.

　　So at present, the use of Hyper-threading technology can be understood as icing on the cake, this function more, you should be white to send, do not need white, but if it is not bought, then the proposal to give priority to price, can spend less money it.