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macguru9999

macrumors 6502a
Original poster
Aug 9, 2006
824
390
I bought an NVIDIA GT640 from ebay that had been flashed for the mac boot screen. I think its the macvidcards rom although i dont know the actual source of this card. It works just fine with mojave for the spare 3,1 .

Also, I bought an unflashed NVIDIA GT640 from ebay for much less. The cards LOOK identical. I downloaded nvflash and saved the rom file from card 1. then I installed card 2, the unflashed one, and tried to flash it with the saved file. It did not work, despite using the override commands that work when flashing , say, the GTX 680. It says mismatch or whatever and does not do the flash.

Does anyone have any suggestions ?
 
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