12 core processor upgrade series intel xeon twelve core number of processing cores 12 number of threads 24 clock frequency 25 ghz turbo boost processor code name haswell ep tdp 120 watt stepping revision m0 stepping front side bus 4 800 mhz quickpath interface 96 gts l2 cache 12 x 256 kb l2 cache 3 072 kb l3 cache 30 kb manufacturing process 22 nm suitable for hewlett packard system package fclga2011 features mmx sse sse2 sse3 sse41 ss