Intel Core i7 7700T 's Advantages
Better graphics card performance
Higher base frequency (2.9GHz vs 2.5GHz)
Lower TDP (35W vs 65W)
Intel Core i5 12400 's Advantages
Released 5 years late
Higher specification of memory (4800 vs 2400)
Larger memory bandwidth (76.8GB/s vs 38.4GB/s)
Newer PCIe version (5.0 vs 3.0)
Larger L3 cache size (18MB vs 8MB)
More modern manufacturing process (10nm vs 14nm)