RockStrongbow Posted June 6, 2014 Share Posted June 6, 2014 Hi, After having no luck with HD4600 on Haswell refresh, I bought a EVGA GeForce 210, which works OOB. Now I also have a GTX 750 Ti which I want to use for CUDA (with Linux). However, this card isn't currently supported in OS X. So, I followed http://www.insanelymac.com/forum/topic/139016-howto-two-cards-one-supported-by-osx-another-one-is-not/ but without luck. The G210 switches to power save on HDMI/DVI after boot. The boot itself is successful. Basically I can only get graphics when booting with nv_disable=1 or when removing the 750 Ti. The other thing I've tried is injecting an EFI string with GraphicsEnabler=No, but again only got a black screen. I extracted the EFI string from ioreg, regarding the PCI config, i.e. 750 Ti being on slot #1 (16x) and the 210 is on #2 (4x). Are there any other hints on that one? Cheers, RS Link to comment https://www.insanelymac.com/forum/topic/298565-dual-gpu-set-primary-peg-leads-to-black-screen/ Share on other sites More sharing options...
alcarbin Posted August 21, 2014 Share Posted August 21, 2014 Did you solve the issue? I am currently running through the same issue, any help would be appreciated Link to comment https://www.insanelymac.com/forum/topic/298565-dual-gpu-set-primary-peg-leads-to-black-screen/#findComment-2053823 Share on other sites More sharing options...
Ritz Carltn Posted September 1, 2014 Share Posted September 1, 2014 I have GTS 250(Tesla) and GTX 660Ti(Kepler) with Clover. I used dsdt.aml atm, I stll working on atm, Link to comment https://www.insanelymac.com/forum/topic/298565-dual-gpu-set-primary-peg-leads-to-black-screen/#findComment-2057061 Share on other sites More sharing options...
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