Intel Xeon E5 4620 's Advantages
Lower TDP (130W vs 210W)
Xeon w7 2555X 's Advantages
Released 12 years and 3 months late
Higher specification of memory (4800 vs 3)
Newer PCIe version (5 vs 3)
Higher base frequency (3.3GHz vs 2.2GHz)
Larger L3 cache size (33.75MB vs 16MB)
More modern manufacturing process (10nm vs 32nm)