Intel Xeon X5677 's Advantages
Higher base frequency (3.466GHz vs 2.6GHz)
Intel Xeon E5 2650 v2 's Advantages
Released 3 years and 6 months late
Newer PCIe version (3 vs 2)
Larger L3 cache size (20MB vs 12MB)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (95W vs 130W)