Intel Xeon E5 1660 v3 's Advantages
Released 5 years and 1 months late
Higher specification of memory (2133 vs 1333)
Newer PCIe version (3 vs 2)
Larger L3 cache size (20MB vs 8MB)
More modern manufacturing process (22nm vs 45nm)
Xeon W5590 's Advantages
Higher base frequency (3.333GHz vs 3GHz)
Lower TDP (130W vs 140W)