Intel Core i7 6800K 's Advantages
Higher base frequency (3.4GHz vs 3.3GHz)
Larger L3 cache size (15MB vs 12MB)
Intel Core i3 12100 's Advantages
Released 5 years and 8 months late
Integrated graphics card
Higher specification of memory (4800 vs 2133)
Newer PCIe version (5.0 vs 3.0)
More modern manufacturing process (10nm vs 14nm)
Lower TDP (60W vs 140W)