edit: ULPS seemed to be the culprit. I had disabled it but it seems i had to find 4 different ones to disable. now Xfire seems to work i have the horizontal line flickering - i think. it looks like an old tv with a scrambled signal, or a monitor that has a lower resolution than the video card puts out. I tried D3Doverrider, as well as a number of other things. would rolling back the driver maybe help? i sent a support ticket but i don't have an answer yet... and note: this happens with every game, as soon as crossfire is running. windowed/catalyst ai/xfire disabled it goes away, but fullscreen with those two on it flickers. so crossfire effectively doesn't work, making my second card useless. both cards work great individually. any help is greatly appreciated. thank you.