Intel Xeon E5 2640 v2 's Advantages
Released 10 months late
Newer PCIe version (3 vs 2)
Larger L3 cache size (20MB vs 8MB)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (95W vs 115W)
Opteron 6308 's Advantages
Higher specification of memory (1866 vs 3)
Higher base frequency (3.5GHz vs 2GHz)