Opteron 1352 (B2) 's Advantages
Higher specification of memory (800 vs 4)
Larger L3 cache size (2MB vs 1.5MB)
Intel Xeon D 1521 's Advantages
Released 7 years and 5 months late
Newer PCIe version (3 vs 2)
Higher base frequency (2.4GHz vs 2.1GHz)
More modern manufacturing process (14nm vs 65nm)
Lower TDP (45W vs 95W)