So the output when just turned on after being off for a while was:
Then I ran some demanding software for about 15 mins, the temps got up to those shown below and then seemed to stabilise at about that level:
In case it is relevant, it doesn't seem that running more demanding...
I had a new desktop PC delivered in March. Maybe a month or so ago I was having a minor issue where the PC would sometimes freeze a few minutes after being turned on (the mouse would stop moving and the keyboard doesn't do anything and whatever was on screen at the time just remains there, so...