Intel Core i7 7740X 's Advantages
Higher base frequency (4.3GHz vs 3.7GHz)
Lower TDP (112W vs 125W)
Intel Core i5 12600K 's Advantages
Released 4 years and 5 months late
Integrated graphics card
Higher specification of memory (4800 vs 2666)
Larger memory bandwidth (76.8GB/s vs 42.7GB/s)
Newer PCIe version (5.0 vs 3.0)
Larger L3 cache size (20MB vs 8MB)
More modern manufacturing process (10nm vs 14nm)