Xeon EC5509 's Advantages
Lower TDP (85W vs 250W)
Xeon 6740E 's Advantages
Released 14 years and 4 months late
Higher specification of memory (6400 vs 1066)
Newer PCIe version (5 vs 2)
Higher base frequency (2.4GHz vs 2GHz)
Larger L3 cache size (96MB vs 8MB)
More modern manufacturing process (5nm vs 45nm)