Opteron 1389 's Advantages
Higher specification of memory (1333 vs 3)
Higher base frequency (2.9GHz vs 2.6GHz)
Opteron 3380 's Advantages
Released 3 years and 6 months late
Larger L3 cache size (8MB vs 6MB)
More modern manufacturing process (32nm vs 45nm)
Lower TDP (65W vs 115W)