Intel Xeon E5 1603 v3 's Advantages
Released 5 years and 1 months late
Higher specification of memory (1866 vs 1333)
Newer PCIe version (3 vs 2)
Larger L3 cache size (10MB vs 8MB)
More modern manufacturing process (22nm vs 45nm)
Xeon W5590 's Advantages
Higher base frequency (3.333GHz vs 2.8GHz)
Lower TDP (130W vs 140W)