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I'm running 2 5770's crossfired and had them on one monitor with no problems. (the cards have not been overclocked yet) I set up my second monitor and all the sudden started getting screen flickering and tearing while in internet browsers and in idle. Note this only happened when i hooked up my other monitor. I am completely lost and have no ideas what to do can anyone help?
 

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I used to have a similar issue but it only happened when I OCed my card. The best solution to raise your 2D core/memory clocks by flashing the bios. Personally, I tested a few different bioses before settling at 400/1000 for my 2D clocks. Whatever works I guess. :/

Like you, my second monitor would also flicker. If you don't want to flash your bios, you can try this method. It might work, it might not.
 
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