Xeon E7 8870 's Advantages
Larger L3 cache size (30MB vs 12MB)
Xeon E 2176M 's Advantages
Released 7 years late
Higher specification of memory (2666 vs 1333)
Higher base frequency (2.7GHz vs 2.4GHz)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (45W vs 130W)