stick with a single video card, especially if you have a slower cpu like the 6100. Dual cards will give you more microstuttering (even more so than usual) if you dont have a serious cpu to keep up the fps in cpu bound titles. Get a better single card, and upgrade to a piledriver cpu, that will see a good overall improvement in gaming. Crossfire gives you a high average framerate, but it does not provide a smopoth gaming experience, unless you feel like stuffing around with radeon pro. I have been there and tried that, and now im selling my crossfire 6850's.