I just got a monitor with 2560x1400 resolution and I have a Gigabyte HD6870. Sometimes I turn my pc on and I see little green horizontal lines over the dark portions of the screen. I go into the ATI panel and turn ON GPU scaling and the lines go away. Then after several starts the green lines come back. I turn GPU scaling OFF and the lines go away. It seems like it doesnt matter if the gpu scaling is on or off but just switching it makes the lines go away. Any ideas about whats going on?
Update the drivers. Current version available from AMD is 12.10. 12.11 is also available as a beta release. If you have tried all of the above, and symptoms still occur the shut down the computer, open the case, remove and reseat the graphics card. Make sure that the graphics card is fully inserted and then put the computer back together and restart.
Had a feeling,well 12.10 came out in October and they already have 12.11 in beta might I suggest trying to update either via the catalyst manager or uninstalling the catalyst manager and install using this
Some reason I clicked on update and it said I had the latest version. I then uninstalled and downloaded the beta and it's still happening but not as much. I'm buying a new card and wanted to go with the 7970, however; the 680 is looking much better