Opteron 2224 SE 's Advantages
Higher base frequency (3.2GHz vs 2.4GHz)
Intel Xeon D 1521 's Advantages
Released 8 years and 3 months late
Higher specification of memory (4 vs 2)
Newer PCIe version (3 vs 1)
More modern manufacturing process (14nm vs 90nm)
Lower TDP (45W vs 119W)