Xeon L5645 's Advantages
Lower TDP (60W vs 160W)
Intel Xeon E5 2687W v3 's Advantages
Released 3 years and 7 months late
Higher specification of memory (2133 vs 1333)
Newer PCIe version (3 vs 2)
Higher base frequency (3.1GHz vs 2.4GHz)
Larger L3 cache size (25MB vs 12MB)
More modern manufacturing process (22nm vs 32nm)