I want to use a graphics card which is not supported by OSX with a Mac Pro 2008. On the Mac Pro 2008 there is already installed a Geforce 8800 GT. With bootcamp i want to use a GeForce GTX 470 graphics card only in Windows 7 - 64bit. I dont need the GeForce GTX 470 in OSX. Does the Mac Pro 2008(2x2.8ghz quadcore) have enough pci-slot-space to install both Geforce 8800 GT and the Geforce GTX 470? Should these steps work: 1. Install the Geforce GTX 470 in the second pci-slot. 2. Only connect the DVI-cable of the Geforce 8800 GT to a monitor and start the Mac-OSX with Geforce 8800 GT. 3. Install Bootcamp en install in here Windows 7 - 64 bit. 4. Start Windows 7 - 64 bit with Bootcamp. Connect a new DVI-cable from the Geforce GTX 470 to a new monitor(or the same). Will i be able to use the Geforce GTX 470 succesfully after step 4? If yes, after i install the newest drivers of Geforce GTX 470 for the Windows 7 - 64 bit OS and Bootcamp, will the video editing programs such as Premiere Pro and Powerdirector support the Geforce GTX 470 without any problems? Will the motherboard(or other components) of the Mac Pro be damaged in a way if i put these 2 graphics card in the pci-slots? Can the powersupply of a Mac Pro 2008 handle both cards? Does it matter if the cards arent of the same model? I just want to use Geforce GTX 470 with bootcamp and Geforce 8800 GT with Mac-OSX. After installation of the GTX 470 in the second pci-slot, do i have to connect this card to the powersupply with a cable? How do i do this for both cards and which cables do i need for this? And is there something else i should do? I had read somewhere that there could be needed an extern powersupply, but couldnt i just use the standard powersupply of the Mac Pro 2008 for both videocards(since it should be supporting 900-1000Watt if i am not wrong)?