AMD Ryzen 9 6980HX 's Advantages
Better graphics card performance
Higher specification of memory (LPDDR5-6400 vs DDR5-5200)
Lower TDP (45W vs 45W)
AMD Ryzen 5 7645HX 's Advantages
Released 1 years late
Larger memory bandwidth (83.2GB/s vs 76.8GB/s)
Newer PCIe version (5.0 vs 4.0)
Higher base frequency (4.0GHz vs 3.3GHz)
Larger L3 cache size (32MB vs 16MB)
More modern manufacturing process (5nm vs 6nm)