Dual Screen Preformance drop

You probably could do that, just make sure that you have your primary display set on your ATI, (cuz it's faster)

the reason you noticed a FPS drop is because you are making the one video card render the game and another desktop. (presuming you use one screen for gaming).

Furthermore make sure you have a strong enaugh power supply, and do not attempt to sli the cards. (not that you can ATI+NV, and skills if you can )

Should work, but im not sure

hope this helps

PS, looking at your information, how can you have joined in 1970, but your 21 years old? WTF??!! You would at least be 39 presuming you joined on the day of your birth.....

Hehe might be a ATi thing not sure, so shouldnt have any driver conflicts between ati and NV then, thats good ill see how it works and let yall know.

I could be wrong since I am still using XP, but...

Based on what I've read, WinXP will allow you to uses both ATI and nVidia drivers. Vista (and presumably Win 7) only allows you to use one set of drivers. So under Vista, both cards must be ATI or nVidia.

Edit:

Seems like the OP posted while I was responding.

There is no workaround. Both cards must be from the either ATI, or nVidia.