AMD Ryzen 9 4900H 's Advantages
Higher specification of memory (LPDDR4X-4266 vs LPDDR4-4266)
Larger memory bandwidth (68.27GB/s vs 51.2GB/s)
Higher base frequency (3.3GHz vs 3.0GHz)
Lower TDP (35W vs 35W)
AMD Ryzen 9 5900HS 's Advantages
Released 10 months late
Larger L3 cache size (16MB vs 8MB)