Intel Xeon E5 2690 's Advantages
Released 2 years and 6 months late
Newer PCIe version (3 vs 2)
Higher base frequency (2.9GHz vs 2.533GHz)
Larger L3 cache size (20MB vs 8MB)
More modern manufacturing process (32nm vs 45nm)
Xeon X3440 's Advantages
Higher specification of memory (1333 vs 3)
Lower TDP (95W vs 135W)