Intel Xeon D 1557 's Advantages
Released 9 years 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 95W)
Opteron 2220 's Advantages
Higher base frequency (2.8GHz vs 1.5GHz)