Xeon X3440 's Advantages
Higher specification of memory (1333 vs 4)
Intel Xeon E3 1275 v3 's Advantages
Released 3 years and 9 months late
Newer PCIe version (3 vs 2)
Higher base frequency (3.5GHz vs 2.533GHz)
More modern manufacturing process (22nm vs 45nm)
Lower TDP (84W vs 95W)