Depending on how much other hardware you are running in your system, a 350W brand name PSU might do it, but if you have a high powered video card, a few hard drives, an optical drive or 2, and plan on overclocking at all....you will need more than 350W IMO. I cant stress enough that it is highly recommended to not cheap out on a PSU, it will hurt you more than anything, especially if you plan to overclock.