Intel Xeon E5 2620 v2 's Advantages
Released 2 years and 7 months late
Newer PCIe version (3 vs 2)
Larger L3 cache size (15MB vs 12MB)
More modern manufacturing process (22nm vs 32nm)
Xeon L5645 's Advantages
Higher specification of memory (1333 vs 3)
Higher base frequency (2.4GHz vs 2.1GHz)
Lower TDP (60W vs 80W)