Intel Xeon E5 1603 v3 's Advantages
Released 4 years and 6 months late
Higher specification of memory (1866 vs 3)
Newer PCIe version (3 vs 2)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon X5670 's Advantages
Higher base frequency (2.933GHz vs 2.8GHz)
Larger L3 cache size (12MB vs 10MB)
Lower TDP (95W vs 140W)