Intel Xeon E5 4640 v3 's Advantages
Released 5 years and 3 months late
Higher specification of memory (1866 vs 3)
Newer PCIe version (3 vs 2)
Larger L3 cache size (30MB vs 12MB)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon X5667 's Advantages
Higher base frequency (3.066GHz vs 1.9GHz)
Lower TDP (95W vs 105W)