Opteron 4376 HE 's Advantages
Higher base frequency (2.6GHz vs 1.8GHz)
Lower TDP (65W vs 225W)
Xeon 6756E 's Advantages
Released 11 years and 6 months late
Higher specification of memory (6400 vs 3)
Larger L3 cache size (96MB vs 8MB)
More modern manufacturing process (5nm vs 32nm)