Intel Xeon E7 8870 v3 's Advantages
Released 6 years late
Higher specification of memory (1866 vs 1333)
Newer PCIe version (3 vs 2)
Larger L3 cache size (45MB vs 6MB)
More modern manufacturing process (22nm vs 45nm)
Opteron 1381 's Advantages
Higher base frequency (2.5GHz vs 2.1GHz)
Lower TDP (115W vs 140W)