Intel Xeon E7 8891 v3 's Advantages
Released 3 years and 3 months late
Higher specification of memory (1866 vs 3)
Larger L3 cache size (45MB vs 10MB)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon E5 2643 's Advantages
Higher base frequency (3.3GHz vs 2.8GHz)
Lower TDP (130W vs 165W)