Intel Xeon E3 1270 v3 's Advantages
Released 3 years and 3 months late
Newer PCIe version (3 vs 2)
Higher base frequency (3.5GHz vs 2.266GHz)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon L5640 's Advantages
Higher specification of memory (DDR3 vs DDR3)
Larger L3 cache size (12MB vs 8MB)
Lower TDP (60W vs 80W)