2 Graphics Cards, but not at the same time

[Pokey]

I have a 5750 which does not work with OSX, so I am using my 7600. However, this is slow when I game using Win7. Is it possible to have both cards installed on my mobo and use different cards for each OS?

 

[thelostswede]

It might be, but it means manually swapping the cable between them.
Windows 7 now supports drivers for multiple cards from different manufacturers, so that's at least possible on that side.
As far as OS X is concerned, it'll involve some heavy DSDT editing.

 

[tonymacx86]

I don't think it's at all possible to use an ATI and nVidia card in any os plugged in at the same time. But I've never tried- you're in pioneer territory there.

 

[thelostswede]

You can in Windows 7 now, which is why Nvidia's Optimus works only on Windows 7 notebooks. We might end up seeing that on the MacBook refresh...
Intel graphics when mobile, Nvidia graphics when plugged in, all done on the fly.