Intel Core i5 1240U 's Advantages
Released 10 months late
Higher specification of memory (5200 vs 4266)
Larger memory bandwidth (76.8GB/s vs 68.27GB/s)
Newer PCIe version (4.0 vs 3.0)
Lower TDP (9W vs 45W)
AMD Ryzen 9 5900H 's Advantages
Higher base frequency (3.3GHz vs 1.1GHz)
Larger L3 cache size (16MB vs 12MB)
More modern manufacturing process (7nm vs 10nm)