I overclocked my 9500GT a bit with nTune, and I know how to keep the settings, per se, but my problem is that a few seconds after I click the "accept" button, my screen turns a bluish-gray color and my computer becomes unresponsive until I shut it down with the power button. This also happens whenever I attempt to manually load a profile. Either way, the overclock doesn't stick. The overclock itself was stable, and I was able to play through all of Half-Life 2: Lost Coast at maximum settings and 1440 x 900 resolution with no artifacting whatsoever. I'm using the 190.38 drivers and version 5.05.54 of nTune on 32-bit Vista Home Premium. Another thing worth mentioning is that two "Unknown SEEPROM Device" errors before nTune starts up.