Sorry,my problem is i get this screen once a day when pc it's not at load.Temperature of GPU stay at 43 at idle.I test videocard ram with program nothing.
I'm sorry but the picture isn't that clear.
Also, what are your other symptoms? Does the computer freeze or become unresponsive? Or do you just see those funny lines but everything else works fine? Have you tried using the integrated graphics? If so do you have the same problem with it?