Opteron 6168 's Advantages
Lower TDP (115W vs 135W)
Intel Xeon E5 4655 v3 's Advantages
Released 5 years and 3 months late
Higher specification of memory (DDR4-2133 vs DDR3)
Newer PCIe version (3 vs 2)
Higher base frequency (2.9GHz vs 1.9GHz)
Larger L3 cache size (30MB vs 12MB)