Intel Xeon D 1521 's Advantages
Released 7 years and 6 months late
Higher base frequency (2.4GHz vs 1.8GHz)
More modern manufacturing process (14nm vs 65nm)
Lower TDP (45W vs 68W)
Opteron 8346 HE (B3) 's Advantages
Higher specification of memory (667 vs 4)
Larger L3 cache size (2MB vs 1.5MB)