Intel Xeon E5 1620 's Advantages
Higher base frequency (3.6GHz vs 3.2GHz)
Intel Xeon E 2356G 's Advantages
Released 9 years and 6 months late
Higher specification of memory (3200 vs 3)
Newer PCIe version (4 vs 3)
Larger L3 cache size (12MB vs 10MB)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (80W vs 130W)