AMD Ryzen 7 3700U 's Advantages
Better graphics card performance
Lower TDP (35W vs 75W)
AMD Ryzen 9 7845HX 's Advantages
Released 4 years late
Higher specification of memory (5200 vs 2400)
Larger memory bandwidth (83.2GB/s vs 35.76GB/s)
Newer PCIe version (5.0 vs 3.0)
Higher base frequency (3.0GHz vs 2.3GHz)
Larger L3 cache size (64MB vs 4MB)
More modern manufacturing process (5nm vs 12nm)