I have a question. I currently have two GTX 760s in SLI, and I was wondering if I could run a third
card (dual 760 gpu card) in my sli configuration (http://www.maximumpc.com/asus_launches_mars_760_graphic...).
I heard it was possible to crossfire an AMD APU processor with a dedicated GPU since they both have the same GPU architecture, but i wanted to know if it was at all possible to run a dual gpu in sli with one or two other single gpu cards. My main reason for asking this is because my motherboard has three pci express slots, two of which are occupied with my gtx 760s. For the sake of not having to invest alot of money on a new motherboard, i wanted to know if the aforementioned was possible. Thanks.
Yes it is possible to add a third card to run separately, but it will run at reduced speed (because of PCIe limitations). If it is an Nvidia card, it should work fine and can even be used as a dedicated Physx card. But if you add an AMD card you will need to install AMD drivers. It might work but you're almost certain to get a lot of problems.
And to correct you, an AMD APU is able to crossfire with an AMD GPU, but not with Nvidia. The discrete card will slow down to match the APU's capability, so it's usually pointless do that.