Opteron 8218 (F2) 's Advantages
Higher specification of memory (667 vs 3)
Higher base frequency (2.6GHz vs 2.4GHz)
Lower TDP (95W vs 115W)
Intel Xeon E5 2665 's Advantages
Released 5 years and 7 months late
Newer PCIe version (3 vs 1)
More modern manufacturing process (32nm vs 90nm)