Intel Xeon E5 1660 's Advantages
Larger L3 cache size (15MB vs 8MB)
Intel Xeon E3 1241 v3 's Advantages
Released 2 years and 2 months late
Higher specification of memory (DDR3-1600 vs DDR3)
Higher base frequency (3.5GHz vs 3.3GHz)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (80W vs 130W)