Intel Xeon D 1520 's Advantages
Released 5 years and 11 months late
Newer PCIe version (3 vs 2)
Higher base frequency (2.2GHz vs 2GHz)
More modern manufacturing process (14nm vs 45nm)
Lower TDP (45W vs 50W)
Opteron 13KS EE 's Advantages
Higher specification of memory (1333 vs 4)
Larger L3 cache size (6MB vs 1.5MB)