Opteron 6168 's Advantages
Higher base frequency (1.9GHz vs 1.6GHz)
Intel Xeon E5 2603 v3 's Advantages
Released 4 years and 6 months late
Higher specification of memory (1600 vs 3)
Newer PCIe version (3 vs 2)
Larger L3 cache size (15MB vs 12MB)
More modern manufacturing process (22nm vs 45nm)
Lower TDP (85W vs 115W)