Yeah PSU is important. I had a Seasonic 500w PSU and it was not enough for the 285. While it worked, it would do weird stuff like video dropouts, stuttering, etc. Upgraded to an 850w Thermaltake Toughpower XT modular (figured if I'm gonna spend a lot, might as well get the best) and all problems are gone. I also tried out the popular Corsair 850HX but it was much too large and was not quite as flexible in terms of outputs, nor does it give as much user feedback as the new Thermaltakes. I was able to fit the aforementioned thermaltake in the bottom of a P182 case while retaining the HDD middle fan - good luck doing taht with the corsair!