I am running an HD 7950, and I am thinking about putting my old GTX 470 in as a dedicated Physx card. My problem is, when I'm not gaming my 7950 is running 100% so I can't deal with the extra heat or power draw of the 470. Is there any way to turn off the physx card when it's not needed? I looked around in my bios for an option to disable my 2nd PCI Express slot, but didn't see anything. Thanks, and all my system specs are in my sig.