Can anyone help before I do a complete O/S un- and install? I have been using a GF3 Ti200 and switched it to a GF4 Ti4600 card.Everything was nirvana until I decided to uninstall NVMax and install and use the GeForce Tweak Utility. I made a backup of my registry, and created a new set point (WinXp). Read the help and started tweaking. Lost 10 FPS and gained a lot stuttering! Opened the utility and set to pre settings. Uninstalled the utility. No help, still a loss of 10 FPS. Used NVMax, no help. Reset registry, back to system set point, new install of 4in1 drivers, and a fresh install of the video drivers. Nothing has helped. All I can think of is that the tweak utility changed some settings somewhere and did not undo as it was supposed to. I have checked and re-checked everything I can think of.Anyone have any ideas? Appreciate any help!dek

Did you try to uninstall, reboot, and reinstall video drivers?

Thanks, but yep! dek

Try pulling a copy of NVCleaner and giving it a try, it attempts to strip every reference of the nVidia drivers off your machine in hopes of getting past your tweaked problem.You should also make sure you run the Refresh Rate Fix after installing a new driver to set things back up.http://www.guru3d.com/files/Ray