I was getting temperature alerts on the temp sensor #2 (CPU) on my ML350 G4 server. I took the heat sink off the CPU and noticed that there was no heat sink compound but there was a square of silvery something attached to the heatsink. I decided to go ahead and apply some heat sink compound inbetween and reinstalled the heatsink. I also cleaned the fins of the sink.
Firing everything back up I saw that the temp sensor now indicated 62 degrees instead of the 59 degrees that it indicated before the operation. Is the temp sensor in the CPU or part of the fan assembly? I am thinking it is in the airflow of the fan indicating that the heat transfer is better now to the heat sink than before. I am no longer getting the temperature alerts. Am I right?
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You may want to get another reading on the temperature with a different application, in case the one you're using isn't properly calibrated. SpeedFan should give you some more results. 62C is within operating temperatures, but still seems a little high. The Xeon processors are designed to throttle themselves down instead of burning up if there is no heatsink in place.
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by: CallandorPosted on 2009-09-03 at 13:26:40ID: 25254598
What you saw was probably a thermal pad, as opposed to thermal grease - you don't need thermal grease if you have a thermal pad, but I think metal-to-metal contact with thermal grease filling in the small gaps is a better way to transfer heat.
The thermal sensor is usually on the motherboard below the cpu socket, which is as close as it can get to the actual cpu. It's peculiar that your readings increased and yet the alarm no longer send alerts - did the trigger value get changed?