Intel Xeon E5 1620 's Advantages
Released 4 years and 4 months late
Newer PCIe version (3 vs 2)
Higher base frequency (3.6GHz vs 2.8GHz)
More modern manufacturing process (32nm vs 45nm)
Xeon E5462 's Advantages
Higher specification of memory (3 vs 3)
Lower TDP (80W vs 130W)