Mod Edit: Split from https://www.bleepingcomputer.com/forums/t/679293/computer-shuts-off-after-startuprunning-for-some-time/ - Hamluis.
Made an account for this very issue. Though I've not tried nearly as many things. I tried different RAM slots, one stick at a time, ect. Temps are perfect with everything. Bought a PSU tester that passed. Tried other things like disabling the power button just in case it was faulty, checked for loose wires. Nothing seemed off or wrong with the PC except for these random shut downs. Although what's weird is if something was open when it went to shut down I could cancel it if I acted fast enough. When I disabled the power button it just shut off like a power outage. I feel like if I needed a new motherboard then I would be having more/ other issues but maybe I'm wrong. I built it almost 3 years ago as a first time builder and haven't run into any major issues until now. I've been wanting to build a new pc but didn't plan to this soon but I just might. I will probably buy a new motherboard first and test it with my current parts.
TC is your pc still not shutting down with the new motherboard?
Edited by hamluis, 26 June 2018 - 09:58 AM.