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AMD Ryzen 5000 Zen 3 support is rolling out for ASUS, ASRock, Biostar, Gigabyte and MSI 500 series motherboards; no B450 or X470 support until January 2021 at the earliest - NotebookCheck.net News
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Amazon.com: Asrock B450 PRO4 R2.0 AM4 AMD Promontory B450 SATA 6Gbps ATX AMD Motherboard : Electronics
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B450 B450M Motherboard ASRock B450 GAMING-ITX/AC Socket AM4 For Ryzen 5000 G-Series cpu 2xDDR4 PCIe 3.0 64GB USB 3.1M.2 Mini-ITX - AliExpress
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Asrock B450 Steel Legend Motherboard Bios Update Now Supports Ryzen 5000 Series Processors - YouTube
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