Intel Xeon X5690 's Advantages
Higher base frequency (3.466GHz vs 3.3GHz)
Intel Xeon E5 2667 v2 's Advantages
Released 2 years and 7 months late
Newer PCIe version (3 vs 2)
Larger L3 cache size (20MB vs 12MB)
More modern manufacturing process (22nm vs 32nm)