Intel Core i5 8259U Advantages
Lower TDP (28W vs 45W)
Intel Core i7 12800H Advantages
Released 3 years and 9 months late
Better graphics card performance
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)
Higher base frequency (2.4GHz vs 2.3GHz)
Larger L3 cache size (24MB vs 6MB)
More modern manufacturing process (10nm vs 14nm)