AMD Ryzen 3 Pro 5450U Advantages
Integrated graphics card
Higher specification of memory (LPDDR4-4266 vs DDR5-5600)
Lower TDP (15W vs 28W)
AMD Ryzen 5 PRO 8640U Advantages
Released 3 years and 1 months late
Newer PCIe version (4 vs 3.0)
Higher base frequency (3.5GHz vs 2.6GHz)
Larger L3 cache size (16MB vs 8MB)
More modern manufacturing process (4nm vs 7nm)