Opteron 3380 's Advantages
Lower TDP (65W vs 130W)
Intel Xeon E5 2637 v2 's Advantages
Released 9 months late
Newer PCIe version (3 vs 2)
Higher base frequency (3.5GHz vs 2.6GHz)
Larger L3 cache size (10MB vs 8MB)
More modern manufacturing process (22nm vs 32nm)