Intel Xeon E5 1681 v3 's Advantages
Released 1 years and 10 months late
Higher specification of memory (2133 vs 1866)
Newer PCIe version (3 vs 2)
Larger L3 cache size (25MB vs 8MB)
More modern manufacturing process (22nm vs 32nm)
Opteron 6308 's Advantages
Higher base frequency (3.5GHz vs 2.9GHz)
Lower TDP (115W vs 135W)