Intel Xeon E3 1220 v3 's Advantages
Released 3 years and 3 months late
Higher specification of memory (1600 vs 1333)
Newer PCIe version (3 vs 2)
Higher base frequency (3.1GHz vs 1.866GHz)
More modern manufacturing process (22nm vs 45nm)
Lower TDP (80W vs 95W)
Xeon L7555 's Advantages
Larger L3 cache size (18MB vs 8MB)