Hey everybody. I am getting a pair of GTX 780s and will be running them in SLI mode. I am getting the SC versions from EVGA with the ACX aftermarket cooling system and I pln on overclocking them further. I am going to be running them right next to a 120 mm exaust fan. Will this be enough to expel the extra heat that they produce? Or should I just go with the stock version of the gtx 780? Would it's cooling system be enough to overclock? A watercooling loop is out of the question for me.