Intel Xeon E5503 's Advantages
Lower TDP (80W vs 115W)
Opteron 6308 's Advantages
Released 2 years and 8 months late
Higher specification of memory (1866 vs 3)
Higher base frequency (3.5GHz vs 2GHz)
Larger L3 cache size (8MB vs 4MB)
More modern manufacturing process (32nm vs 45nm)