https://wccftech.com/amd-radeon-rx-600-series-graphics-cards-polaris-gpu-rebrands-spotted/

AMD’s Radeon RX 600 series graphics cards have been spotted in the latest drivers and they are not the Navi powered lineup you were hoping for. Discovered by user “Just Some Noise” at TPU forums, the new driver includes listings of Radeon RX 600 series cards but the two mentioned in the lineup are based on the Polaris GPU architecture.

So there are two AMD Radeon RX 600 series models that are listed within the Adrenaline 19.4.3 release. These include the Radeon RX 640 and Radeon RX 630. The first impression would be that these two graphics might be the first models based on the Navi GPU architecture but that isn’t the case as both models share the same device ID as the Radeon RX 500 series cards.