Intel Core i7 8705G 's Advantages
Higher base frequency (3.1GHz vs 2.5GHz)
Intel Core i9 12900H 's Advantages
Released 4 years late
Integrated graphics card
Higher specification of memory (5200 vs 2400)
Larger memory bandwidth (76.8GB/s vs 37.5GB/s)
Newer PCIe version (4.0 vs 3.0)
Larger L3 cache size (24MB vs 8MB)
More modern manufacturing process (10nm vs 14nm)