On Apr 11, 2012, at 8:01 AM, Baudais Michael wrote:
Hmmm, maybe I just noticed it after that cleaning because I was
checking to see if the temperature dropped...
Other notes:
- both pumps are running at 2436 rpm right now
- Temps are 45.6, 45.3, 33.6, 32.6 C
- Fans are at 2162, 2162 (CPU Exhaust)
- I have not run thermal calibration - I have the installer, but I
don't have a blank external drive I can sacrifice at the moment.
Has anyone figured out how to use these tools with a disk image or
something?
You can do it with a USB thumb drive
- The temps have risen slowly over the years since 2005 - I started
running it full-time on reduced power because I had a couple of
thermal shutdown events. This was about a year after replacing the
thermal grease. Might be time for another re-greasing? The
original grease was dry and cracked, so re-doing it was a good idea
at the time, but maybe I didn't get good stuff...
- OK, I started an mp4 conversion, and switched to Automatic in
Energy Saver Options - after 30s with all 4 CPUs around 90% the
stats are:
- both pumps are running at 3600 rpm
- Temps are 92.6, 90.9, 42.8, 41.0
- Fans are at 3200
Yeah, 90C is too high, so I quickly dropped it back to reduced
performance before it shut down. Still encoding, but temps are now
61.8, 61.3, 41.3, 39.3.
That temp 198 F, is not too high in my experience when the machine is
loaded, plus the ambient temp is another very important factor. 65 F
is best.
So 50C sounds like too high a difference, right? Is it possible to
have no leak in the cooling system of a CPU, but have some kind of
blockage in the cooling system?
Did you see any coloration in the floor of the inner case or dampness
on the diaper under the CPU?
I still need to try the power-off test to get the initial CPU temp
diff. But given how quickly the temp changes, I doubt I can get the
software started quickly enough to see the initial temp. It takes a
minute or so to get logged in...
If anyone is interested, I uploaded some photos of the thermal
grease work to flickr at:
http://www.flickr.com/photos/mbaudais01/sets/72157629428579008/
(Haven't really used flickr much so let me know if that isn't
visible to you)
Thanks,
Mike
John Carmonne
Placentia CA 92870
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