Opteron 4340 's Advantages
Released 3 years and 6 months late
Higher base frequency (3.5GHz vs 2.9GHz)
Larger L3 cache size (8MB vs 6MB)
More modern manufacturing process (32nm vs 45nm)
Lower TDP (95W vs 115W)
Opteron 1389 's Advantages
Higher specification of memory (1333 vs 3)