Intel Core i9 12900K 's Advantages
Released 2 years and 3 months late
Higher specification of memory (DDR5-4800 vs DDR4-2933)
Larger memory bandwidth (76.8GB/s vs 43.71GB/s)
Newer PCIe version (5.0 vs 3.0)
Higher base frequency (32GHz vs 3.7GHz)
Larger L3 cache size (30MB vs 4MB)
AMD Ryzen 5 3400G 's Advantages
Better graphics card performance
Lower TDP (45W vs 125W)