CX series is best for office PC's. Not machines that are used for gaming. I'd be willing to bet your CX430 is causing this problem. Upgrade ASAP. XFX Core Edition 550 Watt would be a good choice.http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story3&reid=225http://www.newegg.com/Product/Product.aspx?Item=N82E16817207013
I would also suggest you RMA the Corsair unit. They are pretty good about customer support and honoring warranties.