interesting, my reference card 560ti idles right around 43.. i was going to first say because of increasing case temperatures while the system is finishing booting but the whole driver crash then temperature drop is just wierd... also i would DEFINITELY stop wiggling the card while it is in the socket, that is an accident waiting to happen. i know that when i overclock my card and then turn the fan speed up the fan stops running all together and i get a black screen then a drivers crash sooo i would say it has something to do with the drivers and the fan not running even though afterburner is reporting that it is
Fans are running, I checked. And I'm not even wiggling it, that wasn't fully correct... it's enough to touch it ever so slightly, and the drivers crash with black screen happens, then restore. Temps reporting is correct (card DOES get much colder after temps drop just from the feel of it).
Right now, it's actually idling @ 33C. I have excessive cooling for a single card - there's a side fan and the PSU fan blowing directly on it; without them it idles at 40-42C, too.
EDIT: clean re-install of 280.26 - testing now.