Opteron 3380 's Advantages
Higher base frequency (2.6GHz vs 2.5GHz)
Lower TDP (65W vs 115W)
Intel Xeon E5 2670 v2 's Advantages
Released 9 months late
Newer PCIe version (3 vs 2)
Larger L3 cache size (25MB vs 8MB)
More modern manufacturing process (22nm vs 32nm)