I know there are a ton of threads on this topic and I have read almost all of them. The reason my issue seems unique is that most responses are for new builds that are a week old and are getting the asus surge protection warning after restart. My system has been up and stable for 16 months now with 0 hickups. My system atm is: Asus Sabertooth Z77 Intel 3570k, gskill memory, Samsung 830 SSD, 2x Evga gtx 560ti, Corsair TX750M. That covers the important stuff. The problem: I had a breaker trip the other day and now my pc restarts by itself. It hasn't done that without me restarting it myself since I built it. I am getting no BSOD just a clean restart with no messages. I did notice I was running an older bios and reset bios defaults, cleared cmos and updated to 2003. Now when it restarts by itself I get an error about Asus protecting my hardware etc. from improper voltage regulations. The problem is so strange because sometimes I can play a game and use my system for hours and then the simplest thing as changing a new tab in chrome will force the reboot. Sometimes i dont even run anything and it reboots. I have run prime95 to test memory. It passed 4 passes with 0 errors. The system is water cooled and CPU and GPU are both running at 28 C with no load and 58 C with max load. Again I have had 0 errors or restarts since I built the system - it has literally been up for 16 months with no errors. Since the breaker trip now it does the restart thing. I have RMA'd the PSU and am waiting. Am I headed in the right direction or could it be something else. Thanks