Intel Xeon E5 2690 v2 's Advantages
Released 1 years and 6 months late
Higher base frequency (3GHz vs 2.5GHz)
Larger L3 cache size (25MB vs 15MB)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon E5 2640 's Advantages
Lower TDP (95W vs 130W)