Intel Xeon E5 2640 v2 's Advantages
Released 2 years and 7 months late
Newer PCIe version (3 vs 2)
Larger L3 cache size (20MB vs 12MB)
More modern manufacturing process (22nm vs 32nm)
Xeon L5639 's Advantages
Higher specification of memory (1333 vs 3)
Higher base frequency (2.133GHz vs 2GHz)
Lower TDP (60W vs 95W)