I got a 550w cooler master gold PSU. This is my first build and I made it to run battlefield 3 on ultra settings and it sure does that! I run at 60-120 FPS depending on the map. On single player I run at 60-150 FPS I picked up a 1Tb external hard drive for recording videos onto and the reason I went with an external is so I can keep my favorite games on it so when I go to my dads house I have some games with me. I was going to buy an evga 660 SC vid card but I upgraded to the XFX 7950 Double D edition for the extra GB of vid ram, 4 free games and extra fan and I am happy I did. Everything runs cool the only problem is my case and the psu are a nightmare for cable management! I am also picking up 2 new fans for the top and back of my case to help regulate air flow and keep everything cool! After an hour of working to hide the cables I have done the best I could I have read multiple reviews and I am not the only one whose finds cable management hard with this case, there just aren't enough options on where to move the cables but I have done all I can, I would not recommend this case!