So I have 2x560Ti's in my machine, and everything graphics-related is working great except that on boot (when it goes from the Apple logo/loading bar to the login page) it seems to randomly pick one of the two cards to use for video output. As far as I can tell there's no pattern and it's just luck which one it uses.
Currently I'm mitigating it by running a DVI cable from each card to my monitor which thankfully has dual DVI inputs, but it's a pain to have to switch input sources when it picks the card that isn't used by BIOS/Clover/Windows. Anyone have any experience with this or any advice on how to force OS X to use a specific GPU?
My mobo is an Asrock Z68 Extreme 4 if that makes a difference.
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