Intel Xeon E3 1275 v5 's Advantages
Released 1 years and 1 months late
Higher base frequency (3.6GHz vs 3GHz)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (80W vs 140W)
Intel Xeon E5 1660 v3 's Advantages
Higher specification of memory (2133 vs 2133)
Larger L3 cache size (20MB vs 8MB)