Intel Core i5 7640X Advantages
Higher base frequency (4.0GHz vs 2.4GHz)
Intel Core i9 12900 Advantages
Released 4 years and 8 months late
Higher specification of memory (4800 vs 2666)
Larger memory bandwidth (76.8GB/s vs 42.7GB/s)
Newer PCIe version (5 vs 3.0)
Larger L3 cache size (30MB vs 6MB)
More modern manufacturing process (10nm vs 14nm)
Lower TDP (65W vs 112W)