Intel Xeon E5 2666 v3 's Advantages
Larger L3 cache size (25MB vs 16MB)
Xeon W 1390P 's Advantages
Released 6 years and 6 months late
Higher specification of memory (3200 vs 2133)
Newer PCIe version (4 vs 3)
Higher base frequency (3.5GHz vs 2.9GHz)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (125W vs 135W)