AMD EPYC 9684X 's Advantages
Released 12 years and 4 months late
Higher specification of memory (DDR5-4800 vs DDR3)
Newer PCIe version (5 vs 2)
Higher base frequency (2.55GHz vs 1.6GHz)
Larger L3 cache size (1152MB vs 4MB)
Intel Xeon E5603 's Advantages
Lower TDP (80W vs 400W)