Intel Core i9 9980HK 's Advantages
Better graphics card performance
Larger L3 cache size (16MB vs 12MB)
Lower TDP (45W vs 55W)
Intel Core i5 12450HX 's Advantages
Released 3 years and 1 months late
Higher specification of memory (4800 vs 2666)
Larger memory bandwidth (76.8GB/s vs 41.8GB/s)
Newer PCIe version (5.0 vs 3.0)
More modern manufacturing process (10nm vs 14nm)