Intel Xeon E7 8891 v3 's Advantages
Released 3 years and 3 months late
Higher base frequency (2.8GHz vs 2.4GHz)
Larger L3 cache size (45MB vs 20MB)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon E5 2665 's Advantages
Higher specification of memory (DDR3 vs DDR3)
Lower TDP (115W vs 165W)