AMD64

AMD64, also known as x86-64, x64, or EM64T and Intel 64 to Intel, is a 64-bit CPU architecture introduced by AMD, starting with their Opteron processors. All processors are also backwards-compatible with the x86 instruction set. AMD64 should not be confused with IA-64, an incompatible architecture from Intel in their Itanium processors.

AMD

 * amd a8
 * AMD Opteron
 * AMD Athlon 64
 * AMD Athlon 64 X2
 * AMD Phenom
 * AMD Phenom

Intel

 * Intel Pentium 4 - 6x1 chips of the Cedar Mill core
 * Intel Pentium Extreme Edition
 * Intel Core 2 - Solo, Duo, and Quad models.
 * Pentium Dual-Core
 * Pentium D
 * Intel Xeon - post-Woodcrest