Xeon L5639 's Advantages
Higher base frequency (2.133GHz vs 1.7GHz)
Larger L3 cache size (12MB vs 8MB)
Opteron A1120 's Advantages
Released 4 years and 11 months late
Higher specification of memory (1866 vs 1333)
Newer PCIe version (3 vs 2)
More modern manufacturing process (28nm vs 32nm)
Lower TDP (25W vs 60W)