AMD Ryzen 9 3900XT 's Advantages
Higher base frequency (3.8GHz vs 2.4GHz)
Larger L3 cache size (64MB vs 30MB)
More modern manufacturing process (7nm vs 10nm)
Intel Core i9 12900 's Advantages
Released 1 years and 6 months late
Higher specification of memory (4800 vs 3200)
Larger memory bandwidth (76.8GB/s vs 47.68GB/s)
Newer PCIe version (5 vs 4.0)
Lower TDP (65W vs 105W)