Intel Xeon E5 4620 v3 's Advantages
Released 4 years and 2 months late
Higher specification of memory (1866 vs 3)
Larger L3 cache size (25MB vs 8MB)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon E3 1275 's Advantages
Higher base frequency (3.4GHz vs 2GHz)
Lower TDP (95W vs 105W)