I'm pretty sure I followed the correct steps to overclock my monitor (HP 2009m). But any time I set the refresh rate to anything higher than 60hz, the resolution goes all weird and extends beyond the screen. I set it to 75hz to test it and went to testufo.com and it showed it was running at 75hz there, but the resolution was still messed up. The monitor is 1600x900, and all settings I checked said it was running at that resolution. Please help?