It's happened twice this month - my CPU fans will suddenly rev up to 4,000 RPM, and iStatPro will show the CPU temperature as "--". The first time it happened, I was worried that the machine got too hot. The second time, I had just sat down at the computer in the morning... the top of it was hardly even warm.
Both times, after shutting down and rebooting the fans went back to normal, but the computer performed poorly in graphical tasks such as rendering and gaming until I do an SMC reset, which brings it back to normal.
I haven't installed the recent 27'' iMac SMC update, because I have no need to use the computer in target mode.
Thoughts?
-Nick
Both times, after shutting down and rebooting the fans went back to normal, but the computer performed poorly in graphical tasks such as rendering and gaming until I do an SMC reset, which brings it back to normal.
I haven't installed the recent 27'' iMac SMC update, because I have no need to use the computer in target mode.
Thoughts?
-Nick