tokens: For example , Intel introduced MMX with 64-bit operations in 1997 , Streaming SIMD Extensions ( SSE ) and 128 bit registers in 1999 , SSE2 , SSE3 , SSSE3 and SSE4 from 2000 - 2006 , AVX , AVX2 and FMA with 256 bit registers in 2011 , and AVX-512 and 512 bit registers in 2016 .