Opteron 4310 EE 's Advantages
Released 5 years and 10 months late
Higher specification of memory (DDR3-1600 vs DDR2)
Newer PCIe version (2 vs 1)
More modern manufacturing process (32nm vs 90nm)
Lower TDP (35W vs 95W)
Opteron 2220 's Advantages
Higher base frequency (2.8GHz vs 2.2GHz)