Xeon w7 3555 's Advantages
Released 14 years and 5 months late
Higher specification of memory (4800 vs 3)
Newer PCIe version (5 vs 2)
Higher base frequency (2.7GHz vs 2.666GHz)
Larger L3 cache size (75MB vs 12MB)
More modern manufacturing process (10nm vs 32nm)
Intel Xeon E5640 's Advantages
Lower TDP (80W vs 325W)