" * Will the 2 GX2's run 4 monitors without a drop in fps when not in SLI?"

I just bought the GeForce 9800 GX2, and it works great if you put all your wow's on one screen. But when you enable the second display and move one wow to the new dispay, it is utter crap. Fps drops insanely on all the wow instances. This is in Vista btw, and there is no Horizontal span avialable in Vista. (should not be needed either). I ended up going back to my radeon 1900, works a lot better.. Sadly.