I've built the following system: MSI KT3 Ultra-ARU 512 RAM Athlon 2100 WD120GB 7200 rpms HD System ran fine for 2 years and am now having major probs with it. Recently, my power supply (PSU) wore out. Fine, I had a crappy one and replaced it with another from Enlight. This worked for 1 week and then my RAM controller burnt out (diagnosed by 4 diagnostic lights add on). Purchased new mobo and had same problem. To correct, I purchased new mobo, RAM stick (returned/replaced by Crucial), PSU with quality Silverstone unit, and ethernet card as a random just-in-case fix. This ran fine for 1 day and now I'm getting issues with the CPU. WTF! What happened was random shut offs. I was making sure bios were at DEFAULT to go from there, even though they should have been anyway. So then I tried to restart and now I can't even get the BIOS up. Now the computer starts and shuts itself off after about 5-10 secs. Diagnostic light points to faulty CPU. I guess I'll replace that, too, now. Someone please offer me some advice on this. I'm so frustrated with this machine; might as well have purchased a new system with the money that is flying out of my wallet on repairs for this POS. My current assumption is that the faulty PSU (either the one that burned out or the cheapo new one) damaged everything. Another scenerio is that there is some shorting on my case. Have never heard of this, tho, and if the case were the prob then I don't think I'd have made it for 12 hours of use before my latest setback. Thanks in advance for advice.