Here's the deal, I'll be upgrading my main GPU to a HD 6970 and plan to use SLS (smart taskbar/bezel management) across 3 30" displays. If I want to keep another, separate, Nvidia GPU in the system with a couple of additional monitors hooked into it for whatever purpose, will this mean I can't use those features on the main 30" displays? Furthermore, will just having an additional card in the system disallow those special features?