I’m running 2 NVIDIA cards on my 2008 with no FCP or Color issues. I’ve been pushing both cards pretty hard everyday to see what’ll happen and so far there hasn’t been any problems besides the GT 120’s slower performance in FCP/Color. Running Color with UI playback turned off, 3D Color Space display turned off, and monochrome scopes compensates a bit if you’re using the GT 120.
I’m installing a GTX 285 tomorrow then doing some tests with SwitchResX and posting the results next week.
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