The RX works. Right?I'm sorry but there AREN'T ANY working drivers for the RTX series on macOS, period. Even if VESA mode was somehow possibly enabled he'd still be without any form of hardware acceleration. Btw this is not me, but the advice given by the Opencore team.
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The reason its not appearing in the OCLP boot picker is likely because the Lilu/WEG they are using in the build doesn't have the necessary parameters set for the RTX cards, hence no support. So my suggestion is if he wants to get acceleration for both Windows and/or macOS in his work is to swap the card for a RX6800 or RX6900XT.
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