I am going to buy an Asus A8N-SLI Deluxe MoBo to support an AMD Athlon 64 3700+. My question is about dual graphics cards. This MoBo Supports them, but right now I am using a BFGtech NVidia Geforce 6800 GT Overclocked. In order to use both slots on my MoBo, would I need a duplicate of the current vid. card, or would i need two entirely new cards that are made for such a MoBo? I have been constructing this computer for a few months now and this is the final step. Let me know what you think...Thanks.