Intel Core i9 12900 's Advantages
Newer PCIe version (5 vs 4)
Higher base frequency (2.4GHz vs 1.4GHz)
Larger L3 cache size (30MB vs 24MB)
Intel Core Ultra 7 155HL 's Advantages
Released 2 years and 3 months late
Higher specification of memory (5600 vs 4800)
Larger memory bandwidth (89.6GB/s vs 76.8GB/s)
More modern manufacturing process (7nm vs 10nm)
Lower TDP (45W vs 65W)