Intel Xeon X5677 's Advantages
Higher base frequency (3.466GHz vs 2.6GHz)
Intel Xeon E5 2660 v3 's Advantages
Released 4 years and 6 months late
Higher specification of memory (2133 vs 3)
Newer PCIe version (3 vs 2)
Larger L3 cache size (25MB vs 12MB)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (105W vs 130W)