I posted this on Reddit, but am going to copy it here, because you guys are great and give good advice-
New build, brand new from scratch, about a month old. 13700, ASUS Strix 4070ti, 32 Gb Ram, M2 and SSD, MSI MPG PCIe 5.0 1000w psu, ASUS z790 motherboard.
It has done ok until a week or so ago, had one hiccup. It shut off while playing a random indie disc golf game. I turned it back on and it seemed fine after that.
Last night I was playing fallout 76, not really a game that I would consider putting a load on, its older game, and it shut off again. I turned it back on, loaded game, and when I went back into the server, pc shut off again, when it went into the game where I was at. (loaded game fine, shut off when I logged back in server)
So then I turn it back on with the thought of doing some research on what to look for. At this point, I’m just surfing the web. PC would not run over 3-4 minutes without shutting off.
I turn my old pc on to research, leave the new one off. figured out some things to try, and I did think to unplug the PSU for a few minutes, then turn it back on.
At this point it seemed to run ok. I did the windows memory diagnostic thing, and it passed that. I did a virus scan and it passed that. It was late and I was tired, so I shut down normally and went to bed.
Other things of note and my questions-
Temperatures have seemed fine. So far I have not seen the temps over the high 50s. its averaged 35-45c for the past few weeks, mainly playing fallout and 2K PGA golf. last night it was still running that average. thats the cpu. When I monitored the gpu temp it seemed about the same last week.
At some point about a week ago I started messing with the Armory Crate “smart” fan control. That wouldn’t cause it to shut off, or would it? could that do that? I put it back on standard/turbo speed just in case, but could that be a cause?
My obvious fear is the PSU having a problem, but I don’t know how to test that part, and not like I have another high end PSU that would run my 4070 laying around.
I did notice the 4070 fans not running, but didn’t think anything because as I understand it they won’t run at idle. I do think they spin when the system turns on, but honestly, I haven’t paid much attention yet, because gpu temps haven’t seemed an issue.
Any thoughts or advice on what I should do next?