Opteron 1389 's Advantages
Higher specification of memory (1333 vs 3)
Intel Xeon E3 1280 v2 's Advantages
Released 2 years and 11 months late
Newer PCIe version (3 vs 2)
Higher base frequency (3.6GHz vs 2.9GHz)
Larger L3 cache size (8MB vs 6MB)
More modern manufacturing process (22nm vs 45nm)
Lower TDP (69W vs 115W)