dangerousdave55

I took a chance and bought & installed a new Thermaltake Smart 500W PS and my PC is now running 24/7 without failure. So perhaps the RM650 had reached it's failure point which unfortunately was just outside the 5 year warranty. :[pouts:Thanks to all those that provided help here.

Thanks however, in my original post above I mentioned that I already have the KINGWIN DIGITAL LCD PSU TESTER. I don't know a way of long term testing the PS for hours. Only way I know is how the PS is currently performing.

My RM650 PS does have a C-link output but I don't have a cable. Might having that and associated software help me to diagnose "possible" PS problems causing my PC to drop power?

This system I built in 2015 will be working fine for hours then "click-off" and restart the entire system. Or sometimes it might restart twice within a 15 min period. Sometimes it will be sitting idle for hours and will restart. No indication of a software problem. System has been working without fail for 4 years. My first thought not knowing much about this kind of problem, is to check the PS and some other connectors which I have using KINGWIN DIGITAL LCD PSU TESTER (see photo). With my limited troubleshooting knowledge, I don't see any irregularities. Is there any way to monitor the PS without constantly looking at the tester display and wait for a restart which could be hours? OR might this be a problem other than the PS? See PC specs on drop down box. Any ideas would be appreciated. Thanks, Dave