AMD's new Ryzen 9 laptop CPUs aim to topple Intel's most powerful Core i9 chips | PCWorld
AMD Ryzen 4000 Zen 3 samples cannot reach 5.0 GHz; 16 core successor to the Ryzen 9 3950X in development - NotebookCheck.net News
AMD Ryzen 9 4900U gleams with 4.3 GHz and Radeon graphics
The Best AMD Ryzen 4000 Laptops: Budget, Gaming, and More | Digital Trends
AMD Ryzen™ 4000 H-Series HS Design Standard | AMD
AMD Announces Ryzen 9 4900H and 4900HS: The Halo 35 W and 45 W Mobile APUs
AMD Ryzen 4000-based Dell G5 15 Special Edition gaming laptops available to buy - Ryzen 9 4900H model still MIA but a 120 Hz display option is coming in August - NotebookCheck.net News
AMD Ryzen 9 4900HS Review | TechSpot
AMD details Ryzen Mobile 4000: Performance, architecture, features and better quality laptops | TechSpot
AMD includes the Ryzen 9 4900H and Ryzen 9 4900HS in the Renoir Ryzen 4000 APU lineup: faster base clocks than the Core i9-9880H at 45W TDP - NotebookCheck.net News
AMD Ryzen 9 4900HS performs better than the Ryzen 7 3700X and even the mighty Ryzen 9 3950X in startling UserBenchmark test - NotebookCheck.net News
AMD Ryzen 9 4900HS revealed to have 3.0 GHz base clock and 4.4 GHz boost clock; trails behind Ryzen 7 4800H in first 3DMark 11 tests - NotebookCheck.net News