Replacement video card for mac pro 2008 driver#

So flashed 2600, X1900, 3870, and 7950 can be basically perfect. AMD EFI is like that.Īs long as flashed card matches ports of original card, things went better.

So, flashed 57 cards only show boot screen in one place, on a DVI to VGA adapter. (there is a way tricking EDID onto opposite channel, not worth it) Since Apple had 2 MDP and a DVI on 5770/5870 and no PC cards came that way, we never got boot screen on the digital ports on PC cards. So, even using a cards native PC BIOS combined with the Mac EFI results in a flawed card. The EFI lives a separate existence from the BIOS on a card. AMD/Apple hard coded the display definitions into the EFI. The ability to flash 57 was worked out by Netkas with a little help from myself some years back.

Replacement video card for mac pro 2008 driver#

*6870/6970 is lone exception, Netkas used 64bit iMac EFI to make this work so it is 3,1 or later only*ĮFI is a basic video driver for the card that interacts with the physical system before anything is loaded from HD or CD or whatever. You can verify this by pulling all your HD sleds out 1/2 inch and your EFI boot screen will still show up. Note, the EFI has nothing, NADA, ZERO, ZILCH to do with OS on a HD. They use something called 'EBC EFI' * (Extended Byte Code) WHICH ALLOWS THEM TO FUNCTION ON EITHER SYSTEM. The story is 100% different for AMD cards. This matters for 100% of Nvidia EFI cards, they can only be one or the other. Are you guys ready for some useful details and clarification?Īs far as GPUs and EFI, there are 2 versions of cMP.