I bought it the other day (tenner on play.com) and am running it on my (single) 6600GT with no problems as per Evak. Admittedly soft shadows are off - while nice for 5 minutes, they don't add that much. But even when soft shadows were on, it trundled along at something like 15-20 FPS (estimate). i.e. just at the lower limits of playable with enough judder to be noticeable.