Xeon w7 2555X 's Advantages
Released 13 years and 6 months late
Higher specification of memory (4800 vs 3)
Newer PCIe version (5 vs 2)
Higher base frequency (3.3GHz vs 2.933GHz)
Larger L3 cache size (33.75MB vs 12MB)
More modern manufacturing process (10nm vs 32nm)
Intel Xeon X5647 's Advantages
Lower TDP (130W vs 210W)