AMD Ryzen 7 7840U 's Advantages
Better graphics card performance
Higher specification of memory (LPDDR5x-7500 vs DDR5-5600)
Higher base frequency (3.3GHz vs 2.2GHz)
Lower TDP (15W vs 45W)
Intel Core i9 14900HX 's Advantages
Released 8 months late
Newer PCIe version (5.0 vs 4.0)
Larger L3 cache size (36MB vs 16MB)