I just replaced my old corrupt harddrive with a new 2TB one the other day and am now using a 32 bit version of Windows 7 and now when I've had my PC running for a couple of hours, all of my games run at ridiculous speeds. Also another thing when I'm on iRacing, when it is running at normal speed, on oval circuits I get weird lag where the car slows down slightly then a frame flicks up and I continue. Another thing I should mention that I've done differently this time is download my graphics driver from the Nvidia website as I lost my driver discs too. Can anyone help? I have no idea why its doing it.