Intel Core i7 8700K Advantages
Higher base frequency (3.7GHz vs 3.5GHz)
Intel Core i3 12300 Advantages
Released 4 years and 3 months late
Higher specification of memory (4800 vs 2666)
Larger memory bandwidth (76.8GB/s vs 41.6GB/s)
Newer PCIe version (5 vs 3.0)
More modern manufacturing process (10nm vs 14nm)
Lower TDP (60W vs 95W)