I discussed breifly with my I.T. guy what you have and your problem. what he says is happening is your main video cannot handle the processing load put on it, that card can only handle one monitor running at 1900x1200, so the cpu has to do extra work to render the 20 inch monitor. he said you should be ok if the 24 in was on one card and the 2x 20 are on the other, because than it will be within spec for the cards. this will take the load off your main card and your cpu. one way to check this is to drop the resolution of the 24in. to the same as the 20in (so they are both at the same lower resolution) and check the performance than. If it gets better than change your monitor config.
the 4850x2 is a beast, I recommended it on another thread as being better than running 2 cards in sli. just make sure it will fit in your case ( it is 12" long) and you have the power supply to run it(650 watts or 1000 watts depending on what wires you have)
Connect With Us