Xeon 6740E 's Advantages
Released 14 years and 3 months late
Higher specification of memory (6400 vs 3)
Newer PCIe version (5 vs 2)
Higher base frequency (2.4GHz vs 2GHz)
Larger L3 cache size (96MB vs 12MB)
More modern manufacturing process (5nm vs 32nm)
Intel Xeon L5638 's Advantages
Lower TDP (60W vs 250W)