Intel Xeon E7 4820 v3 's Advantages
Released 4 years and 4 months late
Newer PCIe version (3 vs 2)
Larger L3 cache size (25MB vs 8MB)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon E5607 's Advantages
Higher specification of memory (DDR3 vs DDR3)
Higher base frequency (2.266GHz vs 1.9GHz)
Lower TDP (80W vs 115W)