Intel Xeon E3 1275 's Advantages
Higher base frequency (3.4GHz vs 2.4GHz)
Lower TDP (95W vs 400W)
AMD EPYC 9745 's Advantages
Released 13 years and 6 months late
Higher specification of memory (6000 vs 3)
Newer PCIe version (5 vs 3)
Larger L3 cache size (256MB vs 8MB)
More modern manufacturing process (3nm vs 32nm)