I have a core2 quad q9550 dell 780 MT, my research shows 305 watt PSU. The best card i figure that will work is a single slot GTX 1050m ,$109 on Newegg. The card must be a single slot design, I currently run a gt730 which is wide but 1 slot and works good, but far below the 1050m specs. The best part is the gtx1050m will run on stock psu of 300 watts. although i think an upgrade for 35 bucks to a 600watt is well worth it.