https://wccftech.com/nvidia-geforce-rtx-3090-rtx-3080-rtx-3070-rtx-3060-ti-resizable-bar-bios-support/

NVIDIA partners GALAX & Gainward have released BIOS for GeForce RTX 3090, RTX 3080, RTX 3070, RTX 3060 Ti graphics cards which support the Resizable BAR feature. The RTX 3060 is so far the only GeForce RTX 30 series graphics card that supported Resizable BAR but NVIDIA AIBs are now releasing BIOS support for the rest of the cards.

Both Gainward and GALAX are NVIDIA's first partners to release the respective vBIOS for their RTX 3090, RTX 3080, RTX 3070 & RTX 3060 Ti graphics cards. While the NVIDIA GeForce RTX 3060 comes with Resizable BAR support out of the box, users running the rest of the GeForce RTX 30 graphics cards have to manually update the vBIOS to enable support for the feature. Updating the vBIOS on a graphics card is not complicated but it sure is risky.