It ain't AMD's Navi, but four Radeon 600-series cards have appeared in its drivers
Systems with AMD Radeon 600 series graphics launched - Graphics - News - HEXUS.net
RX 600 Series - Radeon On Roids with "Zen" GPU? - YouTube
SAPPHIRE Technology on X: "Final call to enter the giveaway! This SAPPHIRE NITRO+ AMD Radeon RX 7900 XT Vapor-X 20GB could be yours alongside a goodie bag, @Nacon PCGM 420 Mouse & @