The case can fit full atx motherboards, but I would really recommend if you are getting high temps you most likely are getting air flow. To me going sli and having a higher end system in a 30 dollar case just doesn't make to much since. you will have even higher temps in sli, your components should have room for proper air flow. A can could fit 5 people into it but the people in the back will be shoulder to shoulder feeling cramped and getting even hotter from body heat. I would just recommend buying a higher end case for higher a higher end system. your case is one of those things that you can really future proof if you buy the proper one.