Computer keeps restarting

[Nodachi]

I built a computer for my brother (parts list down below.) And it keeps rebooting unexpectedly. I've checked the event viewer and apart from an error saying that it had restarted unexpectedly there's no sign it had issues or anything pointing to what caused it. I'm not sure what to do from here. It was just built almost a month ago and has been having issues almost every day.

 

https://pcpartpicker.com/list/7VFwNq

[eeeee1]

what has he been doing at the time?

any overclock?

temps?

 

[Nodachi]

23 hours ago, eeeee1 said:

what has he been doing at the time?

any overclock?

temps?

 

It's happened while gaming as well as just checking email. There doesn't seem to be a pattern. I asked him to get core temp installed for temps, but he hasn't gotten to it yet. he'll get it installed tonight and i can get back to you on it, but he says it wasn't running too hard. There's no overclock. He's running a stock cooler so until he upgrades it I instructed him to hold off on that.

[Munch9]

Besides checking temps try some of these:

 

Try take off and on the ram.

Check for any damaged cable in the system, a while ago I had those aesthetic sleeved extensor cables, every  couple of hours the computer just rebooted with aparently no reason, removing the sleeved cables solved completly.