well some people did you multi GPU for compute purpose (and most often this kind of application did not use multi GPU the same way game does). if your purpose really is for gaming then just ditch the idea. the card itself no longer supported by AMD. but even before AMD stop supporting the card their support for CF is not exactly good either. so i'd expect for majority of recent games the card will perform much like on a single 5850. Quad CF support is even worse.