AMD's Ryzen 7000 Series CPUs Feature Integrated RDNA 2 Graphics and DDR5 RAM Support - IGN
AMD Confirms Ryzen 7000 Processors Will Require New Motherboard and Support DDR5 RAM - IGN
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AMD Ryzen RAM scaling - performance effect in games - Introduction
Some AMD Ryzen 7000 Zen 4 CPUs may support DDR4 RAM after all | PCGamesN
G.Skill launches 4,000MHz RAM for lucky AMD Ryzen 5000 CPU owners | PC Gamer