Xeon E5540 's Advantages
Lower TDP (80W vs 83W)
Xeon E 2274G 's Advantages
Released 10 years and 2 months late
Higher specification of memory (2666 vs 1066)
Newer PCIe version (3 vs 2)
Higher base frequency (4GHz vs 2.533GHz)
More modern manufacturing process (14nm vs 45nm)