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Inocense · Feb 15, 2005, 11:53 AM

Anyone else having this problem? Anyone know how to fix it?

Every once in awhile my fans will kick into high gear while I am surfing the web or chatting or basically anything that is not graphics or memory intensive. Not really sure what is going on..

After they speed up all crazy, a couple seconds later they go quiet again..

This has just begun happening now that I installed the new update for Panther.. I think it is 10.3.8....

Any clue?

Ganesha · Feb 15, 2005, 11:57 AM

Turn Processor Performance (under energy saver) to: Highest (yes, it sounds counter intuitive, but something is messed up with Automatic under 10.3.8.)

Maflynn · Feb 15, 2005, 12:09 PM

Yes there's many discussions here and on the apple discussion forum regarding this latest update. It seems to effect a large number of people, I myself will wait till the next one is released.

If your unable to get this to work, your only recourse appears to be a archive and install. A number of people did this over on the apple forum.

Mike

Webscreamer · Feb 16, 2005, 11:59 PM

Reinstalling the system did prove to solve the problem?

OwlBoy · Feb 21, 2005, 10:58 PM

I am having the same issues, and I re-installed my system just before updating to 10.3.8

Dual 1.8

I did what Ganesha suggested and we will see what happens.

-Owl

Webscreamer · Feb 21, 2005, 11:04 PM

Thanks for the info. I played Portage in tennis in high school. You guys sucked! heh

Big Mac · Feb 22, 2005, 01:33 AM

Originally posted by Inocense:
Anyone else having this problem? Anyone know how to fix it?

Every once in awhile my fans will kick into high gear while I am surfing the web or chatting or basically anything that is not graphics or memory intensive. Not really sure what is going on..

After they speed up all crazy, a couple seconds later they go quiet again..

This has just begun happening now that I installed the new update for Panther.. I think it is 10.3.8....

Any clue?

Well, every once in awhile I will experience the same thing on my DP 2.0, but I am only running 10.3.5 on my G5. When this happens, I have noticed that my U3 Heat Sink's reported temperature spikes up to the 170 degree F range for for a couple of seconds and then goes back down to normal levels, followed by the fans returning to normal speed. I imagine that there's a minor bug that causes occasional erroneous temperature reporting. I am unsure as to how this relates to the new reports about fan speed issues in 10.3.8, and I probably won't be upgrading to it because of what I have heard.

OwlBoy · Feb 22, 2005, 06:57 AM

Originally posted by OwlBoy:

I did what Ganesha suggested and we will see what happens.

-Owl

This seems to have "fixed" it for me. No more symptoms.

-Owl

Al G · Feb 22, 2005, 04:07 PM

Originally posted by Big Mac:
Well, every once in awhile I will experience the same thing on my DP 2.0, but I am only running 10.3.5 on my G5. When this happens, I have noticed that my U3 Heat Sink's reported temperature spikes up to the 170 degree F range for for a couple of seconds and then goes back down to normal levels, followed by the fans returning to normal speed. I imagine that there's a minor bug that causes occasional erroneous temperature reporting. I am unsure as to how this relates to the new reports about fan speed issues in 10.3.8, and I probably won't be upgrading to it because of what I have heard.

10.3.8 actually fixes the problem you're describing, which is a fan rev from a single fan, the main logic board backside fan, related to temperature spikes in the memory controller. This problem is specific to rev. B models; it never happens on rev. A models because they use a slightly different U3 which runs cooler.

The fan rev issue introduced by 10.3.8 mentioned by most people (which can be fixed by setting Energy Saver to Highest) is a general or all-fans issue.

djlanger · Feb 22, 2005, 09:57 PM

Originally posted by Al G:
10.3.8 actually fixes the problem you're describing, which is a fan rev from a single fan, the main logic board backside fan, related to temperature spikes in the memory controller. This problem is specific to rev. B models; it never happens on rev. A models because they use a slightly different U3 which runs cooler.

The fan rev issue introduced by 10.3.8 mentioned by most people (which can be fixed by setting Energy Saver to Highest) is a general or all-fans issue.

djlanger · Feb 22, 2005, 10:02 PM

Originally posted by Al G:
10.3.8 actually fixes the problem you're describing, which is a fan rev from a single fan, the main logic board backside fan, related to temperature spikes in the memory controller. This problem is specific to rev. B models; it never happens on rev. A models because they use a slightly different U3 which runs cooler.

The fan rev issue introduced by 10.3.8 mentioned by most people (which can be fixed by setting Energy Saver to Highest) is a general or all-fans issue.

My G5 also has a noisy fan, and even after I reset the energy saver to highest, it's still a lot noisier than any Mac I've ever owned... which isn't too much of a problem unless I'm recording something, and then the mic picks up the fan and ruins the recording. I suppose this is not fixable completely? Should I just wear earplugs when sitting at the iMac and enjoy the peaceful silence?

3.1416 · Feb 23, 2005, 02:48 PM

Originally posted by Al G:
The fan rev issue introduced by 10.3.8 mentioned by most people (which can be fixed by setting Energy Saver to Highest) is a general or all-fans issue. [/B]

Setting Energy Saver to Highest seems to help a bit, but the fans on my G5 (Rev A dual 1.8) are still far louder than they were under 10.3.7. I'll be doing an archive/install downgrade over the weekend, which I'm sure will be loads of fun.

Webscreamer · Feb 23, 2005, 02:51 PM

Originally posted by 3.1416:
Setting Energy Saver to Highest seems to help a bit, but the fans on my G5 (Rev A dual 1.8) are still far louder than they were under 10.3.7. I'll be doing an archive/install downgrade over the weekend, which I'm sure will be loads of fun.

I'm doing the same thing later tonight. If 10.3.9 doesn't fix it, I guess i'll be staying at 10.3.7 till Tiger.

djlanger · Feb 23, 2005, 03:06 PM

Originally posted by 3.1416:
Setting Energy Saver to Highest seems to help a bit, but the fans on my G5 (Rev A dual 1.8) are still far louder than they were under 10.3.7. I'll be doing an archive/install downgrade over the weekend, which I'm sure will be loads of fun.

Seems that after I changed the enregy saver to highest and restarted, the fan began to rev until I thought it would fly out of the monitor, seriously: the pitch increased and I beganto duck down under the chair!
When I shut down completely and started up again the fan noise was noticeably less, and then the next time I fully shut down and started up (not restarted) the fan noise was considerably less - although it still exists and interferes with sound recordings). I'm running 10.3.8.