So I have a mid 09 MPB with a 9600m GT and 9400m. It is my understanding SLI would make no sense between these cards, since downgrading the 9600 to the 9400 would overall reduce the performance. However I'm wondering, would dedicating one card, say the 9600m GT to PysX and the 9400m to graphics (or vice-versa) allow the 9600m GT to remain at a higher performance. Or is this the same exact thing as SLI. I found this kind of weird and surprisingly easy guide http://www.hardwareanalysis.com/content/topic/72593/ I didn't try it since I first wanted to know if it was even worth it. PS. Is there a community for the 9600m GT dedicated to improving game performance in bootcamp.