Intel Core i9 12900K Advantages
Integrated graphics card
Newer PCIe version (5.0 vs 4)
Higher base frequency (32GHz vs 1.2GHz)
Larger L3 cache size (30MB vs 18MB)
Intel Core Ultra 5 125HL Advantages
Released 2 years and 6 months late
Higher specification of memory (DDR5-5600 vs DDR5-4800)
Larger memory bandwidth (89.6GB/s vs 76.8GB/s)
More modern manufacturing process (7nm vs 10nm)
Lower TDP (45W vs 125W)