Intel Xeon E5503 's Advantages
Lower TDP (80W vs 120W)
AMD EPYC 7251 's Advantages
Released 7 years and 3 months late
Higher specification of memory (2400 vs 3)
Newer PCIe version (3 vs 2)
Higher base frequency (2.1GHz vs 2GHz)
Larger L3 cache size (32MB vs 4MB)
More modern manufacturing process (14nm vs 45nm)