X86, x64, i386, i686

X64 is actually 64-bit,

X86 is actually 32-bit.

 

1. i386 is applicable to all 32-bit intel and AMD CPUs and 32-bit CPU via X86 architecture.

Intel platforms include 8086,80286, 80386,80133, Pentium series (1.2.3.4), sai Yang series, and Pentium D series

As well as Centrino P-M, Core Duo and so on.

2. x86_64 is applicable to Intel's 64-bit CPU with X86 architecture, including core 2 Duo, Centrino Core 2 Duo, and Xeon and AMD athlon64/X2, sempron64/X2, and duron64.

3. i686 is only a subset of i386. The supported CPU starts from Pentium 2 (686) and is not supported by the previous model.

X86, x64, i386, i686