Intel Xeon E5 1620 v3 's Advantages
Higher specification of memory (2133 vs 4)
Higher base frequency (3.5GHz vs 3.4GHz)
Larger L3 cache size (10MB vs 8MB)
Intel Xeon E 2124 's Advantages
Released 3 years and 8 months late
More modern manufacturing process (14nm vs 22nm)
Lower TDP (72W vs 140W)