New To Mac-Forums?

Welcome to our community! Join the discussion today by registering your FREE account. If you have any problems with the registration process, please contact us!

Get your questions answered by community gurus Advice and insight from world-class Apple enthusiasts Exclusive access to members-only contests, giveaways and deals

Join today!

 
Start a Discussion
 

Mac-Forums Brief

Subscribe to Mac-Forums Brief to receive special offers from Mac-Forums partners and sponsors

Join the conversation RSS
Apple Desktops Discussion of Apple's desktop machines including Mac Pro, iMac, Power Mac, and mini

Mac Pro - G5 fans on full


Post Reply New Thread Subscribe

 
Thread Tools
macacomoco

 
Member Since: Oct 17, 2005
Posts: 28
macacomoco is on a distinguished road

macacomoco is offline
Hi

I have a G5 1.8 single. I bought it used about 6 months ago, the fans have always been noisy and stupidly I never really looked into it until now (got ear ache!)

I have this data from istat pro:
CPU B Intake......1000rpm
CPU B Exhaust....1000rpm
CPU A................3700rpm
CPU A Intake.......3200rpm
Drive Bay...........4000rpm

It seems some of them are running fast/on full?
So far I've tried, resetting the PRAM, the NVRAM, tried changing the 'energy saver processor preferences' and taken a look to see if there are any visible problems, ie dust or blockages.

Any other ideas guys?
QUOTE Thanks
mac57

 
mac57's Avatar
 
Member Since: Apr 29, 2006
Location: St. Somewhere
Posts: 4,560
mac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant future
Mac Specs: iMac 27" 3.4 GHz, 256 GB SSD, 2 TB HDD, 8 GB RAM

mac57 is offline
Yep, those look pretty fast. My G5 Drive Bay is 1000 RPM, my CPU intakes are 499, my CPU exhausts are 515 RPM.

Other than the noise, is the machine working well? This seems very unusual? I would wonder about a possible sensor fault if all is working well.

My Macs: iMac 27" 3.4 GHz, Mac Pro 3.2 GHz, PowerMac G5 Quad 2.5 GHz, G4 Cube with 1.2 GHz Upgrade
My iStuff: 64GB iPhone 5, 64GB iPad4, 30GB iPod Video, 16GB iPod Touch
My OS': Mac OS X Lion, Mac OS X Snow Leopard, Mac OS X Tiger, Mac OS 9.2.2, openSUSE 10.3
I was on the Mac-Forums honor roll for September 2007
QUOTE Thanks
macacomoco

 
Member Since: Oct 17, 2005
Posts: 28
macacomoco is on a distinguished road

macacomoco is offline
Yes, all is working well, I use the mac 5 days a week, 8 hours a day with no problems apart from making my ears bleed. The temperatures and fan speeds are pretty consistent. The fans come on full as soon as I boot up and don't stop until I shut down.
QUOTE Thanks
mac57

 
mac57's Avatar
 
Member Since: Apr 29, 2006
Location: St. Somewhere
Posts: 4,560
mac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant future
Mac Specs: iMac 27" 3.4 GHz, 256 GB SSD, 2 TB HDD, 8 GB RAM

mac57 is offline
Since you have already done all the usual things, in terms of checking for mechanical cooling system blockages, I would recommend that you do your ears a favor and take the machine in for service. My PowerMac is blissfully quiet. It is one of the most quiet computers I have ever used. There is no reason you should have to endure that aural abuse!

My Macs: iMac 27" 3.4 GHz, Mac Pro 3.2 GHz, PowerMac G5 Quad 2.5 GHz, G4 Cube with 1.2 GHz Upgrade
My iStuff: 64GB iPhone 5, 64GB iPad4, 30GB iPod Video, 16GB iPod Touch
My OS': Mac OS X Lion, Mac OS X Snow Leopard, Mac OS X Tiger, Mac OS 9.2.2, openSUSE 10.3
I was on the Mac-Forums honor roll for September 2007
QUOTE Thanks
Amen-Moses

 
Member Since: Apr 25, 2003
Location: The home of the free and the land that did for Braveheart.
Posts: 1,301
Amen-Moses is just really niceAmen-Moses is just really niceAmen-Moses is just really niceAmen-Moses is just really nice
Mac Specs: 24"iMac, 15"MB-Pro, MacBook, G4 iMac, PM G5 2x2Ghz, G4 iBook & Some PCs

Amen-Moses is offline
Quote:
Originally Posted by macacomoco View Post
Hi

I have a G5 1.8 single. I bought it used about 6 months ago, the fans have always been noisy and stupidly I never really looked into it until now (got ear ache!)

I have this data from istat pro:
CPU B Intake......1000rpm
CPU B Exhaust....1000rpm
CPU A................3700rpm
CPU A Intake.......3200rpm
Drive Bay...........4000rpm

It seems some of them are running fast/on full?
So far I've tried, resetting the PRAM, the NVRAM, tried changing the 'energy saver processor preferences' and taken a look to see if there are any visible problems, ie dust or blockages.

Any other ideas guys?
Update the firmware. http://www.apple.com/support/downloa...updatev11.html

(there may be later versions as well)

Did you say it's a single processor machine, because if it is I'd like to know why the CPU B fans are even running!

I finally fixed my twin G5 fans by doing a totally clean install of OSX Tiger after doing the firmware update, that was about 2 years ago and it has been fine ever since.

Amen-Moses
QUOTE Thanks
mac57

 
mac57's Avatar
 
Member Since: Apr 29, 2006
Location: St. Somewhere
Posts: 4,560
mac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant future
Mac Specs: iMac 27" 3.4 GHz, 256 GB SSD, 2 TB HDD, 8 GB RAM

mac57 is offline
Amen-Moses, the firmware upgrade note doesn't mention anything about fans. What has caused you to link the two together?

Firmware upgrades are frequently risky - I would hate to recommend it unless it is really necessary. A failed firmware upgrade can render the machine unbootable...

My Macs: iMac 27" 3.4 GHz, Mac Pro 3.2 GHz, PowerMac G5 Quad 2.5 GHz, G4 Cube with 1.2 GHz Upgrade
My iStuff: 64GB iPhone 5, 64GB iPad4, 30GB iPod Video, 16GB iPod Touch
My OS': Mac OS X Lion, Mac OS X Snow Leopard, Mac OS X Tiger, Mac OS 9.2.2, openSUSE 10.3
I was on the Mac-Forums honor roll for September 2007
QUOTE Thanks
macacomoco

 
Member Since: Oct 17, 2005
Posts: 28
macacomoco is on a distinguished road

macacomoco is offline
Thanks for the replies.

Yes, it is a single processor, I wondered the same thing too about why all fans are running?

I'm also pretty sure it's a hardware issue as I started the mac off a system disc and the fans are still on full, this would rule out a software issue.

I also phoned up the people that usually look at my mac, who told me that this kind of thing is something they don't look into :mad:

May mean I need to send it off to Apple, I really could do without that though as it's my main mac and I work from home.
QUOTE Thanks
Amen-Moses

 
Member Since: Apr 25, 2003
Location: The home of the free and the land that did for Braveheart.
Posts: 1,301
Amen-Moses is just really niceAmen-Moses is just really niceAmen-Moses is just really niceAmen-Moses is just really nice
Mac Specs: 24"iMac, 15"MB-Pro, MacBook, G4 iMac, PM G5 2x2Ghz, G4 iBook & Some PCs

Amen-Moses is offline
Quote:
Originally Posted by mac57 View Post
Amen-Moses, the firmware upgrade note doesn't mention anything about fans. What has caused you to link the two together?

Firmware upgrades are frequently risky - I would hate to recommend it unless it is really necessary. A failed firmware upgrade can render the machine unbootable...
A couple of years ago the fans issue was a big "hot potato" on all the G5 machines and in particular Apple released a firmware fix for the server range specifically to deal with the fan sensor code problems.

At about that time they also released a firmware update for my twin G5 which didn't mention the fan fix but certainly seemed to fix my fan problems.

Amen-Moses
QUOTE Thanks
mac57

 
mac57's Avatar
 
Member Since: Apr 29, 2006
Location: St. Somewhere
Posts: 4,560
mac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant future
Mac Specs: iMac 27" 3.4 GHz, 256 GB SSD, 2 TB HDD, 8 GB RAM

mac57 is offline
OK, makes sense.

I do recall reading lots of reports of "full on fans" before I purchased my PowerMac, and being worried about it. I decided to take the risk and it has worked out just fine.

If what you are suggesting happened that way, the firmware fix would have been included in my PowerMac since it was manufactured AFTER the fix you mention.

I guess if macacomoco is faced with the alternative of sending the Mac away to Apple for repair or attempting the firmware upgrade, the firmware upgrade seems a sensible first choice!

So macacomoco, back up everything first, then try the upgrade. If it fails, you are still in need of sending the machine to Apple. If it succeeds, and it doesn't resolve the problem, ditto. If it succeeds AND it fixes the problem, you are ahead of the game. You have nothing to lose.

My Macs: iMac 27" 3.4 GHz, Mac Pro 3.2 GHz, PowerMac G5 Quad 2.5 GHz, G4 Cube with 1.2 GHz Upgrade
My iStuff: 64GB iPhone 5, 64GB iPad4, 30GB iPod Video, 16GB iPod Touch
My OS': Mac OS X Lion, Mac OS X Snow Leopard, Mac OS X Tiger, Mac OS 9.2.2, openSUSE 10.3
I was on the Mac-Forums honor roll for September 2007
QUOTE Thanks
Amen-Moses

 
Member Since: Apr 25, 2003
Location: The home of the free and the land that did for Braveheart.
Posts: 1,301
Amen-Moses is just really niceAmen-Moses is just really niceAmen-Moses is just really niceAmen-Moses is just really nice
Mac Specs: 24"iMac, 15"MB-Pro, MacBook, G4 iMac, PM G5 2x2Ghz, G4 iBook & Some PCs

Amen-Moses is offline
I've just found this:

http://www.apple.com/support/downloa...areupdate.html

It is for the very early G5 systems but it does actually mention fan behaviour.

(if your firmware is later the updater will not install so it is safe to try out these updates, just make sure you do not switch off the machine while the updater is running if it does need to install it)

Amen-Moses
QUOTE Thanks
macacomoco

 
Member Since: Oct 17, 2005
Posts: 28
macacomoco is on a distinguished road

macacomoco is offline
I backed-up and tried the firmware updates but it said the updates were not needed.

One thing that I can't believe I never noticed before is that I've just realised although I have a 1.8single processor, the mac case if a 1.6 (it only has the 4 ram slots). Could that be anything to do with the fan issue?

Here is the hardware overview:
Hardware Overview:

Machine Name: Power Mac G5
Machine Model: PowerMac7,2
CPU Type: PowerPC 970 (2.2)
Number Of CPUs: 1
CPU Speed: 1.8 GHz
L2 Cache (per CPU): 512 KB
Memory: 2 GB
Bus Speed: 900 MHz
Boot ROM Version: 5.1.5f2
QUOTE Thanks
Amen-Moses

 
Member Since: Apr 25, 2003
Location: The home of the free and the land that did for Braveheart.
Posts: 1,301
Amen-Moses is just really niceAmen-Moses is just really niceAmen-Moses is just really niceAmen-Moses is just really nice
Mac Specs: 24"iMac, 15"MB-Pro, MacBook, G4 iMac, PM G5 2x2Ghz, G4 iBook & Some PCs

Amen-Moses is offline
Quote:
Originally Posted by macacomoco View Post
I backed-up and tried the firmware updates but it said the updates were not needed.

One thing that I can't believe I never noticed before is that I've just realised although I have a 1.8single processor, the mac case if a 1.6 (it only has the 4 ram slots). Could that be anything to do with the fan issue?

Here is the hardware overview:
Hardware Overview:

Machine Name: Power Mac G5
Machine Model: PowerMac7,2
CPU Type: PowerPC 970 (2.2)
Number Of CPUs: 1
CPU Speed: 1.8 GHz
L2 Cache (per CPU): 512 KB
Memory: 2 GB
Bus Speed: 900 MHz
Boot ROM Version: 5.1.5f2
Interesting, I wonder if the previous owner had a CPU failure and when it was replaced the CPU sensor wasn't correctly connected or something?

I'm not sure how the connections work on the G5s as I've never been brave enough to try and remove one (especially seeing as how mine is the Dual CPU model, there is hardly any room at all i the CPU part of the case).

Have you tried finding a temperature sensor reading App for your model? If the CPU temperature sensor is reading something funny that would be a start.

Amen-Moses
QUOTE Thanks
mac57

 
mac57's Avatar
 
Member Since: Apr 29, 2006
Location: St. Somewhere
Posts: 4,560
mac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant futuremac57 has a brilliant future
Mac Specs: iMac 27" 3.4 GHz, 256 GB SSD, 2 TB HDD, 8 GB RAM

mac57 is offline
macacomoco, I am not sure I understand what this:

Quote:
although I have a 1.8single processor, the mac case if a 1.6 (it only has the 4 ram slots)
means. Can you elaborate please?

My Macs: iMac 27" 3.4 GHz, Mac Pro 3.2 GHz, PowerMac G5 Quad 2.5 GHz, G4 Cube with 1.2 GHz Upgrade
My iStuff: 64GB iPhone 5, 64GB iPad4, 30GB iPod Video, 16GB iPod Touch
My OS': Mac OS X Lion, Mac OS X Snow Leopard, Mac OS X Tiger, Mac OS 9.2.2, openSUSE 10.3
I was on the Mac-Forums honor roll for September 2007
QUOTE Thanks
macacomoco

 
Member Since: Oct 17, 2005
Posts: 28
macacomoco is on a distinguished road

macacomoco is offline
mac57 - sorry, my bad typing. What I mean is that the actual mac itself says 1.6 on the case and is the 1.6 model because it has 4 ram slots (not 8 like the 1.8) but the processor is definitely 1.8.

Here are my temperature readings:
CPU A.........49c
CPU A Amb..18c
Us heatsink..35c
Drive Bay....24c
Backside.....17c
QUOTE Thanks
Amen-Moses

 
Member Since: Apr 25, 2003
Location: The home of the free and the land that did for Braveheart.
Posts: 1,301
Amen-Moses is just really niceAmen-Moses is just really niceAmen-Moses is just really niceAmen-Moses is just really nice
Mac Specs: 24"iMac, 15"MB-Pro, MacBook, G4 iMac, PM G5 2x2Ghz, G4 iBook & Some PCs

Amen-Moses is offline
Quote:
Originally Posted by macacomoco View Post
mac57 - sorry, my bad typing. What I mean is that the actual mac itself says 1.6 on the case and is the 1.6 model because it has 4 ram slots (not 8 like the 1.8) but the processor is definitely 1.8.

Here are my temperature readings:
CPU A.........49c
CPU A Amb..18c
Us heatsink..35c
Drive Bay....24c
Backside.....17c
That' a cool backside! :tusks:

I can't really see this being a hardware problem as the sensor readings all look about right and the fans are under software control, about the only suggestion I can make is to try a completely clean install of OS X and see what the fans do before you install any updates.

If you only have one HD you could buy another one and swap them (i.e remove the one in there and put the new empty one in it's place), then do the clean install to the new drive and go from there. (SATA drives are pretty cheap at the moment)

If that fixes things then you will know that it is definitely a software problem and if it doesn't you'll at least have more drive space.

Amen-Moses
QUOTE Thanks

Post Reply New Thread Subscribe


« Possible to use built in isight AND an external one? | intel duo 2 »
Thread Tools

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off
Forum Jump

Similar Threads
Thread
Thread Starter
Forum
Replies
Last Post
Fans full on? DCraver Apple Desktops 5 06-15-2006 09:21 PM
Installed New HD, Now Fans Always 100% newkai Apple Notebooks 0 05-27-2006 09:44 AM
New core solo fans always on full chief99 Apple Desktops 5 04-25-2006 01:31 PM
iMac fans blasting more in Tiger? code777 Apple Desktops 9 05-24-2005 09:42 AM
iMac fans go full blast after put to sleep!? code777 OS X - Operating System 5 04-06-2005 12:16 PM

All times are GMT -4. The time now is 03:15 AM.

Powered by vBulletin
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
X

Welcome to Mac-Forums.com

Create your username to jump into the discussion!

New members like you have made this community the ultimate source for your Mac since 2003!


(4 digit year)

Already a member?