Intel Xeon E5645 's Advantages
Larger L3 cache size (12MB vs 8MB)
Intel Xeon E3 1270 v3 's Advantages
Released 3 years and 3 months late
Higher specification of memory (4 vs 3)
Newer PCIe version (3 vs 2)
Higher base frequency (3.5GHz vs 2.4GHz)
More modern manufacturing process (22nm vs 32nm)