Well 53 c on prime is excellent-
try to clear dust as suggested, compressed air-
Indeed, it is a great temp. I'm just confused as to why it is rising when the temp outdoors gets colder. Suppose I'll buy some AS5 and reapply paste in a couple weeks.
I did notice, however, that the temps were at their usual this morning. 30c NB, 31-32c CPU, 36c SB. Ran 10 passes of intel burn test on standard stress and it peaked at 52c.