6 core processor upgrade series intel xeon six core socket socket 1366 number of processing cores 6 clock frequency 253 ghz turbo boost max turbo frequency 28 ghz processor code name westmere ep tdp 80 watt stepping revision b1 stepping quickpath interface 586 gts l2 cache 6 x 256 kb l2 cache 1 536 kb l3 cache 12 kb voltage 135 v manufacturing process 32 nm suitable for hewlett packard system package fclga10 features intel ht intel vt