My i7 D0 stepping idles around 42-43'C at stock 2.66GHz. I have the Mugen2 cooler installed with the room temperature at around 78'C-80'C.
I ran prime95 for 20minutes and it hit a high of 72'C.
Is this normal?
Did I screw up the HSF installation by using a bit too much thermal paste? (I used MX2, spread a thing layer on the cpu itself and a tiny rice sized grain on the heatsink plate...maybe that was a bit too much?)
Or is this because my room temperature is a bit high?
aye. I'm angry at my Biostar TP43 board, which is supposedly "good for overclocking" yet doesn't even have the option to manually set the cpu voltage in BIOS. >_<
Yea, you might of done too much paste. Bigger than a grain of rice, smaller than a small pea. Put in the middle, place cooler gently, twist just a bit and mount it, cros screwing the threads slowly.
Only you'll know if your temps are better. Does your case have a back panel? While the mobo is out cut a hole to access the back of the mobo for the HS, just have to remove the back cover.