Intel Xeon E5 2650 's Advantages
Released 4 years and 4 months late
Newer PCIe version (3 vs 2)
More modern manufacturing process (32nm vs 45nm)
Xeon E5440 's Advantages
Higher specification of memory (3 vs 3)
Higher base frequency (2.833GHz vs 2GHz)
Lower TDP (80W vs 95W)