MMX : Multi Media eXtensions

Technology from Intel.

MMX is designed to run faster when playing multimedia applications via use of Single Instruction Multiple Data (SIMD) techniques.

MMX capable CPU

Intel :

Pentium MMX
Celeron
Pentium II
Pentium III
Pentium 4

AMD :

K6
K6-2
K6-3
Athlon
Duron