Opteron 6278 's Advantages
Lower TDP (115W vs 140W)
Intel Xeon E5 1603 v3 's Advantages
Released 2 years and 4 months late
Higher specification of memory (DDR4-1866 vs DDR3)
Newer PCIe version (3 vs 2)
Higher base frequency (2.8GHz vs 2.4GHz)
Larger L3 cache size (10MB vs 8MB)