Xeon 6740E 's Advantages
Released 12 years and 1 months late
Higher specification of memory (6400 vs 3)
Newer PCIe version (5 vs 3)
Larger L3 cache size (96MB vs 8MB)
More modern manufacturing process (5nm vs 22nm)
Intel Xeon E3 1280 v2 's Advantages
Higher base frequency (3.6GHz vs 2.4GHz)
Lower TDP (69W vs 250W)