Intel Xeon E5 2658A v3 's Advantages
Released 2 years and 10 months late
Higher specification of memory (2133 vs 3)
Larger L3 cache size (30MB vs 15MB)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (105W vs 130W)
Intel Xeon E5 1660 's Advantages
Higher base frequency (3.3GHz vs 2.2GHz)