I was given a XPS 1730 as a replacement for a Inspiron. The unit has SLI, which is pretty cool, but if SLI is enabled you can't use dual screens. From what I understand there is no way to use dual screens and SLI (as the 1730 has no D/Dock) If I keep SLI disabled so I can run 2 screens all the time. Does the 2nd card do anything? I'm curious if each screen would get their own Video Card.