Xeon E7520 's Advantages
Released 3 years and 7 months late
Higher specification of memory (1333 vs 667)
Newer PCIe version (2 vs 1)
More modern manufacturing process (45nm vs 90nm)
Opteron 8216 HE (F2) 's Advantages
Higher base frequency (2.4GHz vs 1.866GHz)
Lower TDP (68W vs 95W)