Xeon X3480 's Advantages
Higher base frequency (3.066GHz vs 1.7GHz)
Opteron A1120 's Advantages
Released 5 years and 8 months late
Higher specification of memory (1866 vs 1333)
Newer PCIe version (3 vs 2)
More modern manufacturing process (28nm vs 45nm)
Lower TDP (25W vs 95W)