I don't understand why people are willing to spend $200 on a video card or a CPU, but only $40 on a PSU. No offense, but if there's one component that matters the most in your system, it's the PSU. Get yourself a quality PSU. The Corsair HX520 or the Enermax Modu82+ 425W would likely suit you just fine, and both can be found on sale for less than $100. Another great feature, they're modular. Once you start working with modular PSUs, you'll wonder how you ever did without.