Intel Core i3 8350K 's Advantages
Integrated graphics card
Higher base frequency (4.0GHz vs 2.4GHz)
Intel Core i9 12900 's Advantages
Released 4 years and 3 months late
Higher specification of memory (4800 vs 2400)
Larger memory bandwidth (76.8GB/s vs 37.5GB/s)
Newer PCIe version (5 vs 3.0)
Larger L3 cache size (30MB vs 8MB)
More modern manufacturing process (10nm vs 14nm)
Lower TDP (65W vs 91W)