Quick question. You don't need to have two of them connected through a SLI, do you??? Can you just get lets say a Nvidia GeForce 6600GT 256MB PCI-Express video card and put it in your motherboard, without having to have two?
No you don't have to SLI that's only if you want two of them running at the same time one will work fine, if you have a SLI or any other pci-e card then just stick it in a pci-e slot and you all set.