Intel Xeon W3680 's Advantages
Released 9 months late
Higher base frequency (3.333GHz vs 2.9GHz)
Larger L3 cache size (12MB vs 6MB)
More modern manufacturing process (32nm vs 45nm)
Opteron 1389 's Advantages
Higher specification of memory (1333 vs 3)
Lower TDP (115W vs 130W)