I have been having some bad graphics problems & no one seems to have an answer! I bought my system just over a year ago & spent good money on it! I'm using a Pentium 3.2 Ghz assus m/board, 3Gigs Ram, 120 G HD 7200 my graphics card is an "nvidia gforce 6800" which I paid over $500.00 for. I'm using a Dell Ultrasharp 19" Monitor! My problems seem to be around Autodesk Inventor & Solidworks which are both 3d modelling software. Sometimes my display gets so scratchy looking I can barely make out the Menu buttons! When I close a dialogue sometimes the outline is still there with the scratches inside it! Sure sounds like a graphics card problem! I've tried every driver combination  possible. Any Ideas would be well appreciated. I know that this card is not one of the recommended cards for these modelling software programs but others have used them & not had this problem. I've done Virus Scan, Defrag. Appreciate any feedback from anyone who might have experienced this problem! TIA
Paul

Have you installed custom drivers for your monitor or is it using the standard Windows drivers? Check in device manager and see if the monitor is listed as plug and play monitor or is shown as Dell ultrasharp.
If it is shown as plug & play, then it is using the standard Windows drivers.

Second suggestion. Have you tried using the monitor adjustments to improve the image [buttons usually at bottom center of the monitor's case].

Third suggestion. From the description of your problems it sounds like your refresh rate may be set too low. Try increasing it to 85 hertz or more. The software for your card should give you a listing of available modes.

Thanks so much! I will give these suggestions a go tommorow! After spending over $500.00 for a graphics card I'd rather not have to buy another one! I'll let you know what I find out! Have a good one!
Paul