Intel Xeon X5677 's Advantages
Higher base frequency (3.466GHz vs 3.2GHz)
Lower TDP (130W vs 165W)
Intel Xeon Gold 5515 '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 (22.5MB vs 12MB)
More modern manufacturing process (10nm vs 32nm)