Intel Xeon X5677 's Advantages
Higher base frequency (3.466GHz vs 2.9GHz)
Larger L3 cache size (12MB vs 8MB)
Intel Xeon E3 1535M v5 's Advantages
Released 5 years and 7 months late
Higher specification of memory (2133 vs 3)
Newer PCIe version (3 vs 2)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (45W vs 130W)