Some motherboards allow you to use integrated graphics in intel cpus to support your gaming experience but it's not crossfire/sli. For example, my asrock extreme4 z77 board allows me to run Vsync off of the integrated graphics. Good luck getting Nvidia and AMD equipment to play nicely together lol. You can do the PhysX thing, but it would be a little pointless as the 520 is probably more powerful than the APU anyways.