AMD intentionally held back from developing a 600 W, US$1,600 RDNA 3 equivalent for the RTX 4090, feels mainstream gamers can instead spend savings on other PC parts - NotebookCheck.net News
September 2004 3Digest: ATI RADEON X600 PRO 128MB (400/600 MHz)
Systems with AMD Radeon 600 series graphics launched - Graphics - News - HEXUS.net
ATI Radeon X600 Specs | TechPowerUp GPU Database
MSI Radeon RX 5600 XT MECH
AMD has rebadged their budget GPUs again, now called 600-series | TechSpot
AMD Radeon RX 600 series spotted in latest driver update, Polaris rebrand inbound