I hadn't even considered it, but he's still making a fool of himself. I really don't think 50 FPS @ high settings is possible on an HD 4670.
You can set it to 600 secs, but I'd recommend 5 minutes. 10 minutes is a really long time and you'd need to be in the game from the start to finish benching before the round ends.
The desktop 8800 GT is about 50% faster than the desktop 4670 in BC2 according to Tom's HW charts. That's with @ 1920x1080, high settings, no AA and AF and since the FPS is so low on both cards, I believe they turned HBAO on. But the 8800 GT will still be significantly faster when HBAO is turned off, so my point still stands. If I can only do 48 FPS with an 8800 GT @ high settings, no HBAO, no AA, no AF @ 1024x768, then he can't get 50 FPS on the HD 4670 at the same settings.
I had to take a break from this thread for a while because of the nonsense that was being said regarding playing BC2 maxed on a mobile HD4670 (which is about equal to the performance of a desktop HD4650, which is about 2/3 as fast as a 4670). Having played BC2 on my HD4670 (which I had before I upgraded to my current 5750), there is absolutely no way it plays BC2 "maxed" and gets 55fps, even at 13x7 resolution (let alone at 1280x1024 or even 19x12).