In game, at random times my graphics card would reset and downclock everything to 2D clocks. This happened with other games, where 3D clocks wouldn't run at all, and I would have to reset my computer for it to work properly again. But, in SC2, it would run fine, but then randomly downclock itself. I've already re-installed my drivers, running an Nvidia GTS 250 with the 258.96 WHQL drivers. The only way to remedy the situation is to run a youtube video in the background or some other 3D application, but this puts some strain if I decide to play online. Any help would be appreciated.