Okay, I recently replaced the power supply on my desktop machine. This was after, this last Sunday, I went to turn the machine on and the power button wouldn't do anything. It was dead as a Dalek. I replaced the power supply with a Thermaltake TR2 600W ATX PS, and the machine powered on fine. After that, the machine ran for two hours without any trouble, and then suddenly BAM!!! ...it shut off all at once, and the power button started blinking slowly on and off at me. Pressing the power button didn't do anything, it just continued flashing blue at me. (The button always shows blue when on.) I cut power to it and after that it started again, and gave no trouble at all for a good 12 or 14 hours, when I finally shut down for the night. Today, it ran for probably 14 or 15 hours, but then about the time I was almost ready to shut down and head to bed, BAM!!! ...it shut down again, and did the slow blinking power-button thing at me again. I reached back to the back of the machine and flipped the little rocker switch on it off and then back on, and was able to power it back on again. My machine is an AMD FX 8320 Eight-Core Processor 3.5 GHz, 16 GB of ram, Win7 Ultimate, 64bit. I'm not for certain what motherboard it is without opening the case again, but it's probably the MSI 970A-646 (because that's the box at the top of my stack of boxes-stuff-came-out-of), tho it might have been one of the others. The case is something by GLite, I don't remember the exact model on that. The new powersupply, as mentioned above, is a Thermaltake TR2 600W. What do I do from here? How do I determine what's gone screwy? oO Do I have a faulty PS, or is there something wrong with my motherboard?