Intel Xeon X5677 's Advantages
Larger L3 cache size (12MB vs 8.25MB)
Intel Xeon W 2123 's Advantages
Released 7 years and 5 months late
Higher specification of memory (2666 vs 3)
Newer PCIe version (3 vs 2)
Higher base frequency (3.6GHz vs 3.466GHz)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (120W vs 130W)