AMD Ryzen Embedded 8640U 's Advantages
Higher base frequency (3.5GHz vs 2.6GHz)
Lower TDP (28W vs 400W)
AMD EPYC 9655P 's Advantages
Released 6 months late
Higher specification of memory (6000 vs 5600)
Newer PCIe version (5 vs 4)
Larger L3 cache size (384MB vs 16MB)