Xeon X3440 's Advantages
Higher base frequency (2.533GHz vs 2.4GHz)
Lower TDP (95W vs 225W)
AMD EPYC 7642 's Advantages
Released 9 years and 11 months late
Higher specification of memory (3200 vs 1333)
Newer PCIe version (4 vs 2)
Larger L3 cache size (256MB vs 8MB)
More modern manufacturing process (7nm vs 45nm)