Opteron 8224 SE 's Advantages
Higher specification of memory (667 vs 3)
Higher base frequency (3.2GHz vs 2.666GHz)
Intel Xeon E5640 's Advantages
Released 2 years and 7 months late
Newer PCIe version (2 vs 1)
More modern manufacturing process (32nm vs 90nm)
Lower TDP (80W vs 120W)