I use an Nvidia N9800GX2 1gig card on my system but my mobo is for Crossfire. As the N9800GX2 incoprorates 2GPU's is this this the equivalent of an SLi configuration?? I ask this as when i go into the Nvidia Control Panel it recomends that i set it as Multi GPU mode and have done so. When using COD4 in the graphics settings i have selected the Dual Video Card option and it runs just fine. The way i see it is that this card is 2 cards in 1. Phil.