Intel Core i9 11900T 's Advantages
Integrated graphics card
Lower TDP (35W vs 65W)
Intel Core i9 12900 's Advantages
Released 10 months late
Higher specification of memory (4800 vs 3200)
Larger memory bandwidth (76.8GB/s vs 50GB/s)
Newer PCIe version (5 vs 4.0)
Higher base frequency (2.4GHz vs 1.5GHz)
Larger L3 cache size (30MB vs 16MB)
More modern manufacturing process (10nm vs 14nm)