![]() ![]() ![]() Things are different with older R9 280x and 79xx cards which can be flashed with the ROM of the latest official Mac ATI/AMD card, and be fully supported included boot screen. I am not sure an EFI ROM exists that can be flashed, the ROM hack that exists is purely to change the card id and make it appear as identical to the one Apple sells in the e-GPU developer kit - mostly a cosmetic thing, and possibly irrelevant once 10.13.4 is released (the beta seems to properly recognise different AMD PC cards). If you are looking for it, we have it and profile hd dell, msi pci hd, pin zotac fan, xps 200, 560d 2gb, ships, cards gtx graphics, geforce 7300, 4e732 04e732, gpu 180 10473, 1080ti amp extreme, zotac edition ti, oem gigabyte, card pre, 520 n520gtmd1gd3, pin digital, gddr zotac bit, vga 09yjwt, dvi 1gb, dvi gddr rx, sapphire bit, xt ati, n440gt 1gb, radeon. They still don't display the boot screen (as they lack an EFI ROM) but at least OS updates do not break support as the drivers are built-in. ![]() On the AMD front, the recent RX4xx and RX5xx work out of the box with Apple's drivers (in recent versions of macOS). My understanding is that the recent nVidia cards (post GTX680) need some h/w tweaking before being able to be flashed with an EFI ROM anyway so I'm not really sure it is worth the hassle. That's why I kept the orginial GT120 next to a GTX970 in my Mac Pro - it was just a matter of swapping the display cable once in a while. The issue is that you have no boot screen, and no functional display after each macOS update (because the nVidia web drivers are tied to specific macOS versions). Most if not all nVidia PC cards will work in a Mac Pro w/o the need for an EFI ROM once the nVidia web drivers are loaded. The benefit of flash is different depending on brand, model and generation. ![]()
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