Hi Guys, I7 6700K (Just over 12 mths, purchased from forums) Asrock Z170 Extreme4 (PCCG 12mths) Corsair LPX 2400MHZ C14 16GB (PCCG 12mths) SilverStone Strider Plus 600W ST60F-PS (PCCG 24mths) Noctau 9UB-SE2 WF3 R9 290X (Forums - 2.5 years?) CM690 Orig. Windows 10 G110 + G502 After pulling my hair out for the last couple of weeks I am seeking some help/ideas as to what could be going wrong with my PC. The restarts are a hard restart... No Bluescreen or PC freeze. Power gone, then instantly starting back up again. When I first rebuilt the PC and finally got Windows 10 installed it seemed fine but these random restarts happened. Never while gaming, mostly while it appeared to sit idle or when I was just watching some YouTube. After the usual drivers/bios/updates etc they seemed to just fade away with no issues for months and months, even with my PC running for weeks at a time. Now I know this is going to sound like an OVERHEATING issue, as I built it in January last year and this is when I was having the issues and during the cooler months it was fine. I hope it is something so simple but just to try and make this happen i have run; Intel Burn Test w/ 12+ GB for 3 hours - Max temp was around 70C MemTest (from windows) x 5 for 3 hours - No errors or temp issues R6:Siege / ARMA3 - Can crack out a 3-4 hour gaming session without issue. - After gaming sometimes it is fine till the next day, sometimes I open chrome to start browsing and bam, restart. I have taken both sides off the PC, while it is cooler, it doesn't appear any more stable. After the return of these issues just over a week ago I updated all the MoBo drivers as there were some newer ones released since I had last check, Updated my BIOS from 2.x to 7.0, used AMD driver cleaner and reinstalled the newest drivers WITHOUT ReLive. Stock settings on CPU, MoBo settings for RAM (2133) all volts at stock. Unplugged my 2 extra HDD's Unplugged USB hub + Controllers Disabled hardware acceleration within chrome Tested Firefox Tested Chrome Canary Manually reinstalled flash in chrome I have read forum post after forum post with 100's of different 'solutions' but so far haven't found anything that works. Sometimes I feel as if I have had a breakthrough only for it to happen as soon as I get a few minutes into a video. Nearly all the parts are still in warranty, but without ordering replacements it will be hard to discover if something is faulty or if its a software issue. Its not high on my list, but reinstalling windows 10 or even windows 7 could be something to test. Considering I am nearly to the point where I am willing to order a new PC and throw this one outside I need some help <3 Any more info let me know. Thanks, Matt.