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AMD Quietly Releases Low-End OEM Radeon 600 Series: Radeon Rebadge 2019
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AMD Radeon RX 640 re-branding for Polaris GPUs hinted in new drivers | TechRadar
Radeon 500 series - Wikipedia
AMD Radeon RX 640 | tonymacx86.com
AMD Radeon RX 640 and Radeon 630 spotted in the drivers - VideoCardz.com
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