Intel Xeon D 1521 's Advantages
Released 9 years and 3 months late
Newer PCIe version (3 vs 1)
More modern manufacturing process (14nm vs 90nm)
Lower TDP (45W vs 95W)
Opteron 8218 (F3) 's Advantages
Higher specification of memory (667 vs 4)
Higher base frequency (2.6GHz vs 2.4GHz)