Opteron 6262 HE 's Advantages
Lower TDP (85W vs 135W)
Intel Xeon E5 2666 v3 's Advantages
Released 3 years late
Higher specification of memory (2133 vs 3)
Newer PCIe version (3 vs 2)
Higher base frequency (2.9GHz vs 1.6GHz)
Larger L3 cache size (25MB vs 16MB)
More modern manufacturing process (22nm vs 32nm)