plexaphone Posted December 5, 2010 Share Posted December 5, 2010 I have recently installed 10.6.4 on my PC. Working perfectly with one graphics card. It has never worked with my second graphics card installed (actually I am just removing the power cables from the 2nd card to disable it; liquid cooled). The computer seems to boot normally with 2 cards installed but then only a black screen appears. I have tried all of the video DVI ports and none are working with both cards powered up. GTX-285 shows up correctly in system profiler and I believe it has full functionality. I have been trying to research as much as possible here in this forum and I would never have gotten as far as I have without a few of you geniuses. I have my device paths for both card slots from gfxutil. As I understand I need to edit the EFI string? Am I heading in the right direction? I think there are multiple ways to achieve this and I am confused about the best way to go about this. I would really appreciate a nudge in the right direction. Asus P6X58D i7 950 12Gb Ram 2xNvidia GTX285 OSX 10.6.4 Quote Link to comment https://www.insanelymac.com/forum/topic/239068-gtx285-no-output-with-second-card-installed/ Share on other sites More sharing options...
Hangten Posted December 5, 2010 Share Posted December 5, 2010 First part, Thanks aquamac Next Part Quote Link to comment https://www.insanelymac.com/forum/topic/239068-gtx285-no-output-with-second-card-installed/#findComment-1596932 Share on other sites More sharing options...
plexaphone Posted December 5, 2010 Author Share Posted December 5, 2010 Thanks, Yes, I ran across both of those in my searches but since the guide was from 2008 I thought there might be something newer. I assume this is still the most straightforward approach? Thanks, Ryan Quote Link to comment https://www.insanelymac.com/forum/topic/239068-gtx285-no-output-with-second-card-installed/#findComment-1596994 Share on other sites More sharing options...
Hangten Posted December 5, 2010 Share Posted December 5, 2010 "This is now working in 10.6.4 onwards again!" Yes its still valid considering its edit is « Last Edit: Sept 18, 2010, 11:39pm by aquamac » You can also try netkas.org for info on multiple cards. Try kext.com as well... Quote Link to comment https://www.insanelymac.com/forum/topic/239068-gtx285-no-output-with-second-card-installed/#findComment-1597010 Share on other sites More sharing options...
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