Intel Xeon E5 4640 's Advantages
Higher base frequency (2.4GHz vs 2.2GHz)
Lower TDP (95W vs 205W)
Intel Xeon Gold 5520 's Advantages
Released 11 years and 7 months late
Higher specification of memory (4800 vs 3)
Newer PCIe version (5 vs 3)
Larger L3 cache size (52.5MB vs 20MB)
More modern manufacturing process (10nm vs 32nm)