Intel Xeon D 1520 's Advantages
Higher base frequency (2.2GHz vs 1.7GHz)
More modern manufacturing process (14nm vs 28nm)
Opteron A1120 's Advantages
Released 10 months late
Higher specification of memory (1866 vs 4)
Larger L3 cache size (8MB vs 1.5MB)
Lower TDP (25W vs 45W)