Press your PrtScn key (top of the keyboard, above the left arrow key) when the problem arises, open paint, and click paste. Save and upload to your image hoster of choice. This is, of course, assuming the problem is the card and not the monitor.
Tried capturing the lines, but like I expected they're small and don't show up in the screenshot. I'm think it's a driver issue and am going to try another driver. The monitor is pretty new got it during last Christmas so it can't be it.
it's an acer 23" widescreen LCD monitor.
any known issues like I am having with the 258.96 Nvidia drivers?
Have you tried a different monitor? If the problem persists on a different monitor, then the problem is probably the graphics card. Try running memtestx86 overnight, to make sure your ram is good. Also, what CPU are you using?
Any problem I've ever experienced on a computer display that I would discribe as wavy lines was either a monitor going bad or a poor quality unshielded cable going to the monitor. I have never had artifacts caused by a video card that I would discribe as wavy lines. Can you describe the wavy lines in any more detail?
the lines are slim and long normally found at the bottom of the screen going up to about half way. Only does this when gaming. Never noticed it until I got my new card. I'm going to wipe it this weekend.