Weird restarting problem - collective wisdom, please help?

[champ222]

@champ222 did you ever get to the bottom of this issue? i have the same thing and it works okay most of the time when the pc is under a little load from gaming ?!

Yes. It turned out to be the psu. Perhaps a dry joint or a broken cable or something. Looking back at it now, it makes sense. It would work ok until the temp of the psu/system was just right that it failed. Then it would constantly fail, and rebuilding out the case fixed it for a time... all good now the psu has been replaced. Got a good deal on a good psu too which is always nice.