Intel Xeon E5 2667 's Advantages
Higher base frequency (2.9GHz vs 2GHz)
Intel Xeon E5 2640 v2 's Advantages
Released 1 years and 6 months late
Larger L3 cache size (20MB vs 15MB)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (95W vs 130W)