Intel Core i3 12100 's Advantages
Released 2 years and 9 months late
Better graphics card performance
Higher specification of memory (4800 vs 2666)
Larger memory bandwidth (76.8GB/s vs 41.6GB/s)
Newer PCIe version (5.0 vs 3.0)
Higher base frequency (3.3GHz vs 3.1GHz)
More modern manufacturing process (10nm vs 14nm)
Lower TDP (60W vs 65W)
Intel Core i9 9900 's Advantages
Larger L3 cache size (16MB vs 12MB)