Xeon E 2276M 's Advantages
Released 4 years and 8 months late
Higher specification of memory (DDR4-2666 vs DDR4-2133)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (45W vs 140W)
Intel Xeon E5 1660 v3 's Advantages
Higher base frequency (3GHz vs 2.8GHz)
Larger L3 cache size (20MB vs 12MB)