Hello everyone again, I'm back with another question.. I recently bought a PSU that was, what I believed to be, a decent PSU. It was a Xilence 600 watt PSU and was SLI and ATI Crossfire compatible. However, I have the felling that it is ONLY compatible with those types of Mobos . I'm not completly computer ill-literate as i'm taking a Hardware and Troubleshooting class in my highschool. But I just can't het this PSU to work with me-no matter what I do. So I was wondering what kind of a PSU you guys would recommend. Thanks again for your help.