6 core processor series intel xeon six core package tray socket socket 2011 number of processing cores 6 number of threads 12 clock frequency 21 ghz turbo boost max turbo frequency 26 ghz processor code name ivy bridge ep tdp 80 watt stepping revision s1 stepping front side bus 3 600 mhz quickpath interface 72 gts l2 cache 6 x 256 kb l2 cache 1 536 kb l3 cache 15 kb manufacturing process 22 nm suitable for intel system package fclga2