Quad core processor upgrade series intel xeon quad core socket socket 1366 number of processing cores 4 clock frequency 307 ghz turbo boost processor code name westmere ep tdp 95 watt quickpath interface 64 gts l2 cache 4 x 256 kb l2 cache 1 024 kb l3 cache 12 kb voltage 13 v manufacturing process 32 nm suitable for hewlett packard system package fclga10 features intel ht intel vt execute disable bit