6 core processor series intel xeon six core package boxed number of processing cores 6 number of threads 12 clock frequency 35 ghz turbo boost max turbo frequency 38 ghz processor code name haswell ep tdp 140 watt stepping revision r2 stepping l2 cache 6 x 256 kb l2 cache 1 536 kb l3 cache 15 kb voltage 13 v manufacturing process 22 nm suitable for intel system package fclga2011 features mmx sse sse2 sse3 sse41 sse42 advanced vec