Intel Xeon E5 2643 v3 's Advantages
Higher base frequency (3.4GHz vs 3.2GHz)
Lower TDP (135W vs 165W)
Intel Xeon Gold 5515 's Advantages
Released 9 years and 3 months late
Higher specification of memory (4800 vs 2133)
Newer PCIe version (5 vs 3)
Larger L3 cache size (22.5MB vs 20MB)
More modern manufacturing process (10nm vs 22nm)