Intel Xeon X5677 's Advantages
Higher base frequency (3.466GHz vs 3.3GHz)
Xeon E 2456 's Advantages
Released 13 years and 9 months late
Higher specification of memory (4800 vs 3)
Newer PCIe version (5 vs 2)
Larger L3 cache size (18MB vs 12MB)
More modern manufacturing process (10nm vs 32nm)
Lower TDP (80W vs 130W)