Actually, x86 already has 256-bit vector registers (AVX), and will have 512-bit vector registers in a few years (AVX-512). If you include the exotic-but-still-

Actually, x86 already has 256-bit vector registers (AVX), and will have 512-bit vector registers in a few years (AVX-512). If you include the exotic-but-still-x86-based xeon phi it already has 512-bit vector registers.