SLI 590 is actually manageable, it runs around 85C so be sure your computer is well ventilated to help out. Also make sure you have no less than 1000W from a reliable power supply. I would go for either Seasonic, Corsair, Antec, or Eneramax at this range. XFX are decent but I prefer EVGA because they have an awesome customer service and a step up program. XFX will work fine though.