Hello, it's been awhile since I've taken a digital visit here to afterdawn, but I'm really stumped and if there is anyone out there who could help me out, I would greatly appreciate it. Let's get the specs out of the way first, then I will explain the problem as best I can. Shuttle KT400 (AK37) Mobo 512 DDR RAM Althon XP 1800 Radeon 9000 Pro LG CD-Rom LG Writer Macron Power Model : MPT-301 (300 W MAX) I'm running an Arkua fan on my CPU, my power leds and etc "are", I repeat are hooked up properly, etc. Also I am running Win XP Pro for my OS. Now here's the problem. "Totally" random power downs. My system (not monitor or speakers) completely goes BRRRrrr and shuts right off. Sometimes 3 seconds after powering on, sometimes 5 minutes, and then sometimes I can be running it for a full bloody week before it decides to shut off, for what I can tell, no reason whatsoever. Everything regarding my comp (speaker plug, monitor plug and system plug) are plugged into a nice and basically brand new power bar. When it shuts down, I have to flick the main power switch in the back, wait a second, flick it back, and then try powering up again. Like I said it's totally random and doesn't appear to follow a pattern in the slightest. And My CPU is NOT overheating, nor is my mobo. All temps are running just fine. I am SO frustrated and stumped. I am down to the only plausible explanation I can think of...my power supply is a piece of crap? Or perhaps I have too many things for it too handle? Do I need a better one? 400W perhaps? If anyone could help me out in any way it would be superly appreciated!!