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CPU Temperatures
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Mac Enthusiast
Join Date: Feb 2003
Status:
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hey guys,
i was wondering what temperature your powermacs run at...
i just isntalled my replacement powersupply and fan, and cleaned off the thermal paste and put some silver compound between my 867s and my heatsink.
right now, im running at 115.5F/46.4C and rising...
how hot/cool is that for MDD or other powermacs?
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"Take a little dope...and walk out in the air"
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Fresh-Faced Recruit
Join Date: Feb 2003
Status:
Offline
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My Dual 1GHz MDD with the Apple replacement fan kit is currently running at 131.3� F in a room that is 71� F.
It typically runs about 60-62� over the ambient temperature.
I added one modification to the Apple fan kit. After installing the kit, I noticed the CPU fan speed would fluctuate quite a bit.
There's been a lot of talk about modifications on the G4noise.com forums. One guy added a deflector to increase the airflow over the heat sync. It worked for him.
I made a deflector out of a piece of card weight paper. It is tucked in between the CPU fan and where the wires go to connect it. The deflector goes all the way back to the rear of computer, isolating the hard drives from the heat sync.
Now, if the room temperature stays below about 78� F, the CPU fan never speeds up.
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I have read that temperatures up 155� F is not unusual. Your computer will shut down on it's own if the CPU gets too hot.
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Last edited by gfourdoor; Aug 1, 2003 at 03:37 AM.
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Registered User
Join Date: Apr 2000
Status:
Offline
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My CPU is currently running at 16�C.
Beat that. 
(G4 400, mind you...)
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Mac Enthusiast
Join Date: Feb 2003
Status:
Offline
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hah, last night when i posted that my computer had just turned on, by the end of the session, it was at 127 or so. i left it on today, so i will see how hot it is when i get home and post here.
jesus, 16 degrees is nothing.
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"Take a little dope...and walk out in the air"
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Fresh-Faced Recruit
Join Date: Jan 2002
Location: Oregon
Status:
Offline
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Dual 1.25 FW800--hottest it's gotten in a 80F room is 59.6C using Temperature Monitor 1.3
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Dual 1.25 FW800, 12" PB RevA
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Addicted to MacNN
Join Date: Mar 1999
Location: Bellevue, WA
Status:
Offline
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Originally posted by Cipher13:
My CPU is currently running at 16�C.
Beat that.
(G4 400, mind you...)
16�C.. in the Summer? I don't think a heatsink + fan can bring the G4 (7400) lower than room temperature or you have an air-conditioning on and blowing toward the PowerMac.
My Dual 1.25 no higher than 55�C or 131�F under 80�F room temperature (aka basement).
I always load the CPU with SETI@Home. 
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Junior Member
Join Date: May 2002
Location: Germany/Heidelberg or Germany/Dresden
Status:
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Originally posted by Cipher13:
My CPU is currently running at 16�C.
Beat that.
(G4 400, mind you...)
Hmm. I have got a G4/400 too. I replaced the two fans (power supply and the big one cooling pci slots and cpu). Very quiet now - I can even sleep in this room :-) My G4 is running 24/7 at 28� Celsius (don't know what this is in Fahrenheit). I don't really know if TempMonitor shows the correct temperature because it seems very low - just a little bit warmer than the room temperature. But I guess it's just a cool machine ;-)
Lars
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Just a stupid german student - hope you understood me...
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Posting Junkie
Join Date: Oct 2001
Location: South of the Mason-Dixon line
Status:
Offline
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Originally posted by Cipher13:
My CPU is currently running at 16�C.
Beat that.
(G4 400, mind you...)
OK.
My CPU is currently running at 2�C.
(P4 2.53 @ 3.1, mind you)
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Mac Elite
Join Date: Sep 2002
Status:
Offline
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I'm curious to know how hot my cpu is. Do I need any special hardware or something?
How do I find out my cpu temp?
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Mac Enthusiast
Join Date: Feb 2003
Status:
Offline
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nice case, spliff
download temperature monitor to see what your temp is at.
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"Take a little dope...and walk out in the air"
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Mac Elite
Join Date: Sep 2002
Status:
Offline
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Originally posted by DBvader:
nice case, spliff
download temperature monitor to see what your temp is at.
This computer is based on the 'PowerPC 7450' processor. The CPU manufacturer has disabled the Thermal Assist Unit on this chip, so it is not possible to report temperature information.
A feature check executed by the Mach kernel additionally confirms that this processor is not capable of returning temperature values.
A scan of your hardware indicates that there seems to be no alternative temperature sensor available that can communicate with the operating system.
Unfortunately, your hardware does not support temperature monitoring so this application cannot be used.
Looks like I need special hardware.
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Last edited by :XI:; Aug 3, 2003 at 11:49 AM.
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Registered User
Join Date: Apr 2000
Status:
Offline
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Originally posted by Kenneth:
16�C.. in the Summer? I don't think a heatsink + fan can bring the G4 (7400) lower than room temperature or you have an air-conditioning on and blowing toward the PowerMac.
My Dual 1.25 no higher than 55�C or 131�F under 80�F room temperature (aka basement).
I always load the CPU with SETI@Home.
Infact, I have a heater on in here.
It's winter, in Australia.
My CPU has always run cool.
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Dedicated MacNNer
Join Date: Apr 2003
Location: Milwaukee, WI
Status:
Offline
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With my DP 1.42 ghz I'm pushing 130.3� F - 54.6� C.
It gets up to about 135� F maximum.
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Mac Elite
Join Date: Sep 2001
Location: MA, USA
Status:
Offline
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50C under load. About the same as my athlon overclocked from 2500+ to 3200+ under load.
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