64bit ftw...
I've been using it on my 2.4ghz penryn C2D 3GB Ram 8600M GT dell inspiron and I've used it from anything ranging from streaming media to the ps3/360/naughty xbox to gaming and burning and video editing along with photoshop and used alot of homebrew apps for some things and i can't say I've found one thing that wouldn't play ball... it seems very stable with SP1... I previously had a dodgy dell vostro with a 2.2C2D and 4gb ram and when it wasn't overheating and trying to explode it also ran 64 fine so its pretty versityle imho...