AMD Ryzen 5 7645HX 's Advantages
Integrated graphics card
Newer PCIe version (5.0 vs 4)
Higher base frequency (4.0GHz vs 3.2GHz)
Larger L3 cache size (32MB vs 16MB)
AMD Ryzen 5 PRO 8540U 's Advantages
Released 1 years and 3 months late
Higher specification of memory (DDR5-5600 vs DDR5-5200)
More modern manufacturing process (4nm vs 5nm)
Lower TDP (28W vs 45W)