Hello everyone. Like many others I've recently brought an older Mac Pro 4,1 up to speed with SSD, more memory and PC BIOS Graphics card. Thanks to where thanks is due. (Netkas, Rominator, AppleEFI, Cindori etc.) for writing so many great guides for all of us. I now use a XFX Radeon 6870 to drive three screen (27" LED mDP, 20" ACD DVI & 23" ACD DVI), great. But since no EFI on that card no boot screen. Not a huge problem as I don't use boot camp often and can use boot champ etc. But I still want to be able to to recoveries etc in EFI if necessary so I've kept the GT120 in slot4 just in case. Can this be a bad thing? Like software accidentally using much slower GT120 instead of better 6870? (Not the best available I know but very cost effective and lots of connectors, Heaven went from single digits fps to reasonably smooth). Does the monitor connected to card affect performance? Is all acceleration based on the screen connected to certain card or irrespective of? Does it depend on the software? What if I edit images on center screen (fast card) and keep toolbars on side screen (old card), what card would accelerate? Im thinking I could leave one screen on the gt120 for boot screen if that doesn't come with problems. Another option would be to EFI flash the card but from what I've read I would loose the upper DVI doing so?! Maybe i should just try the flash and se what happens. Ive read many threads but not been able to get my head around this, please shed some light!