Intel Xeon W3670 's Advantages
Lower TDP (130W vs 200W)
Intel Xeon w5 2455X 's Advantages
Released 12 years and 6 months late
Higher specification of memory (DDR5-4800 vs DDR3)
Newer PCIe version (5 vs 2)
Larger L3 cache size (30MB vs 12MB)
More modern manufacturing process (10nm vs 32nm)