while still on my current OS I tried to replace video card with my old 9400gt 512mb ddr2 (which while weaker, consumes more power).
The lines weren't that noticeable. now I can't find where i put my Windows 7 installer, I decided to settle with Vista 32bit home premium.
This is what I'm using now, and the only programs that I installed are Microsoft Security Essentials + audio drivers, + amd drivers, ultraiso,winrar, + my games.
The lines still appear, although it seems that they have reduced. (still I'm observing it)
One thing that I have observed though, is that when I right click AMD Catalyst, it shows 2 Radeon HD 6570's, one is for the main display and another one is for the extended display, which I don't have... here:
Thanks a lot.hope you understand my post..