Booting issue since installing second GTX 970

[joelimont]

Hi,
I'm a little stuck... I've had OS X Yosemite on my computer for over a month now and all had been working smoothly. My setup was a Gigabyte GA-X79-UP4, Intel i7 3820, Gigabyte GTX 970 G1 Edition, 32 Gb Ram, and copious amounts of hdds and ssds etc...

Anyway, my issue is that ever since I installed a second GTX 970 in SLI configuration, my computer monitor goes black after the Apple Logo, upon booting in OSX. I've tried plugging into both cards with my DVI cable but thus far - NO LUCK.

Help would be greatly appreciated as if I cannot find a fix I will have to remove Yosemite from my system for good.

Thanks a million Lads and Ladies, Joel.

 

[spudguy77]

SLI + OSX = Bad Times... I've heard that SLI is impossible to set up in OSX because it doesn't know how to deal with SLI. However, there are rumors that OSX works if you have 2 card, but not with SLI.

That said, I have 2 970's installed now and I can't get them working at all, SLI or not :\

Try booting with -v and see what it crashes on.