EVGA G2 series of supplies give a good 'bang for buck' in the PC PSU world. You'd do well to read reviews of PSUs on jonnyguru before investing in it. You'll save your PC components from a hard life, and have decent protection in case of a fault. Do yourself a favour, and invest in a good one. Also many cheaper PSUs can be the cause of random crashes due to unstable, high ripple, power rails. Many people skimp on computer PSUs, forgetting its the heart of the system, till one fails catastrophically, and takes out their expensive CPU's, GPUs, SSDs and HDDs with it.
I second the motion to just replace it, with a good quality PSU.
