That 70 (GPU) is normal, even lowish on 3438; going much over 80 needs something to be done. My fan starts on 59 - 63 (depending also on the CPU temp). That 12 deg. lowering is a nice thing to lappie health.
Originally Posted by MarcVerdonck
Does anybody have an idea what I could do to lower the temperature of the CPU?
My first guess: The fastening screws are loose; the thermal paste has dried and CPU makes a bad contact to the cooling device.
Originally Posted by JohnBurrows
Anyway, I haven't made any changes to my system and this type of sudden performance drop (in benchmarks) makes me wonder...
Some driver install may have changed your PowerMizer settings for example. I've seen it to happen earlier for me.