Intel Xeon E5 2689 's Advantages
Released 2 years and 9 months late
Higher specification of memory (1600 vs 1333)
Newer PCIe version (3 vs 2)
Larger L3 cache size (20MB vs 6MB)
More modern manufacturing process (32nm vs 45nm)
Opteron 1389 's Advantages
Higher base frequency (2.9GHz vs 2.6GHz)