Intel Xeon D 1520 's Advantages
Lower TDP (45W vs 235W)
Xeon 6553P B 's Advantages
Released 9 years and 11 months late
Higher specification of memory (6400 vs 4)
Newer PCIe version (5 vs 3)
Higher base frequency (2.6GHz vs 2.2GHz)
Larger L3 cache size (144MB vs 1.5MB)
More modern manufacturing process (5nm vs 14nm)