Intel Xeon E7 8891 v3 's Advantages
Released 2 years and 7 months late
Newer PCIe version (3 vs 2)
Higher base frequency (2.8GHz vs 2.6GHz)
Larger L3 cache size (45MB vs 8MB)
More modern manufacturing process (22nm vs 32nm)
Opteron 6344 's Advantages
Higher specification of memory (1866 vs 1866)
Lower TDP (115W vs 165W)