The conversation on this page has been archived and is no longer active.

G5 - Proper Temperatures?

Message #1 - Posted 2006/01/05 - ? Colonel ?

Hey, all,

Every once in a while in my office I get a funny smell that reminds me of burning insulation, ozone, or of that "electrical parts cleaner" spray that you use on electric motors, armatures, etc., to get them working again. (Not sure which.)

Hard to describe the smell, but when I smell it, I think "overheating electronics."

Well, I ran "Hardware Monitor Lite" on my 2.0 GHz G5 DP (Rev. B) and saw that the temperature on my Memory Controlller Heatsink was about 145∞ F.

(Activity Monitor doesn't show anything that, to my eye, looks unusual.)

Does anyone know what the maximum temperatures for this machine? Does 145∞ F for the Memory Heatsink sound excessive?

Can anyone offer me any clues on where this weird smell is coming from?

Thanks,

C

Message #2 - Posted 2006/01/05 - Richard Tomkins

This is a good question.

I looked around and find a lot of IC's spec's at -35 to +85 degrees C.

So, 145 degrees F is 63 degrees C, so in fact, you may be in the operating range.

It would be nice to hear from others who use the same tool what temperatures that they are observing.

rtt

"- Colonel -" <nobody@verizon.net> wrote in message news:2006010507382216807-nobody@verizonnet...

Hey, all,

Every once in a while in my office I get a funny smell that reminds me of burning insulation, ozone, or of that "electrical parts cleaner" spray that you use on electric motors, armatures, etc., to get them working again. (Not sure which.)

Hard to describe the smell, but when I smell it, I think "overheating electronics."

Well, I ran "Hardware Monitor Lite" on my 2.0 GHz G5 DP (Rev. B) and saw that the temperature on my Memory Controlller Heatsink was about 145∞ F.

(Activity Monitor doesn't show anything that, to my eye, looks unusual.)

Does anyone know what the maximum temperatures for this machine? Does 145∞ F for the Memory Heatsink sound excessive?

Can anyone offer me any clues on where this weird smell is coming from?

Thanks,

C

Message #3 - Posted 2006/01/05 - Neill Massello

Colonel wrote:

Does anyone know what the maximum temperatures for this machine? Does 145∞ F for the Memory Heatsink sound excessive?

No. My dual 2.0 (PowerMac7,3) is running above 72∞ C without huffing, puffing, or stinking. Hardware Monitor 3.2 shows "not applicable or unknown" for the Memory Controller Heatsink's specified limits.

Message #4 - Posted 2006/01/05 - Rod Smith

Previously, Richard Tomkins wrote:

This is a good question.

I looked around and find a lot of IC's spec's at -35 to +85 degrees C.

So, 145 degrees F is 63 degrees C, so in fact, you may be in the operating range.

It would be nice to hear from others who use the same tool what temperatures that they are observing.

rtt

Well, Im using the first version of the Dual 1.0 Gig G5, and my Memory Controller Heatsink generally runs between 144.9 and 145.2 ∞F with no really serious computing going on -- Activity monitor showing CPU activity at 4 to 6%.

I have my processor performance set to "Highest" and I seldom hear the fans making much noise, although I will admit not to having very acute hearing.

My guess would be that 145∞ is near "normal" and nothing to worry about.

Smelling something overheating is another matter. I would open up the covers and sniff around for starters. I would also look for anything that appears to have been overheated.

Message #5 - Posted 2006/01/06 - ? Colonel ?

On 2006-01-05 18:05:39 -0500, Rod Smith said:

Previously, Richard Tomkins wrote:

This is a good question.

I looked around and find a lot of IC's spec's at -35 to +85 degrees C.

So, 145 degrees F is 63 degrees C, so in fact, you may be in the operating range.

It would be nice to hear from others who use the same tool what temperatures that they are observing.

rtt

Well, Im using the first version of the Dual 1.0 Gig G5, and my Memory Controller Heatsink generally runs between 144.9 and 145.2 ∞F with no really serious computing going on -- Activity monitor showing CPU activity at 4 to 6%.

I have my processor performance set to "Highest" and I seldom hear the fans making much noise, although I will admit not to having very acute hearing.

My guess would be that 145∞ is near "normal" and nothing to worry about.

Smelling something overheating is another matter. I would open up the covers and sniff around for starters. I would also look for anything that appears to have been overheated.

Will do. Thanks for all the replies everyone.

-C

Message #6 - Posted 2006/01/06 - Randy Howard

Rod Smith wrote (in a previous article):

Previously, Richard Tomkins wrote:

This is a good question.

I looked around and find a lot of IC's spec's at -35 to +85 degrees C.

So, 145 degrees F is 63 degrees C, so in fact, you may be in the operating range.

It would be nice to hear from others who use the same tool what temperatures that they are observing.

rtt

Well, Im using the first version of the Dual 1.0 Gig G5, and my Memory Controller Heatsink generally runs between 144.9 and 145.2 ∞F with no really serious computing going on -- Activity monitor showing CPU activity at 4 to 6%.

I seem to get about 145, pretty much regardless of the workload. What is interesting, is I did an experiment where I opened a window (directly next to the chassis) on a very cold nite, and let it suck cold air straight into the front of it. The whole front of the aluminum chassis was cold to the touch, and the temperature sensor didn't change. So, I suspect it would take a LONG time to "cold soak" the chassis enough to make a dent in the proc temp sensor. So, I don't even worry about it anymore.

I have my processor performance set to "Highest" and I seldom hear the fans making much noise, although I will admit not to having very acute hearing.

The sound of a Dell running Linux nearby drowns it out anyway.

My guess would be that 145∞ is near "normal" and nothing to worry about.

Yes.

Smelling something overheating is another matter. I would open up the covers and sniff around for starters. I would also look for anything that appears to have been overheated.

How new is the OP's system? When new, you often smell this for a while.

Randy Howard (2reply remove FOOBAR)
"The power of accurate observation is called cynicism by those who have not got it." - George Bernard Shaw
How 'bout them Horns?

Message #7 - Posted 2006/01/06 - Paul Sture

ñ Colonel ñ wrote:

On 2006-01-05 18:05:39 -0500, Rod Smith said:

Previously, Richard Tomkins wrote:

This is a good question.

I looked around and find a lot of IC's spec's at -35 to +85 degrees C.

So, 145 degrees F is 63 degrees C, so in fact, you may be in the operating
range.

It would be nice to hear from others who use the same tool what temperatures
that they are observing.

rtt

Well, Im using the first version of the Dual 1.0 Gig G5, and my Memory Controller Heatsink generally runs between 144.9 and 145.2 ∞F with no really serious computing going on -- Activity monitor showing CPU activity at 4 to 6%.

I have my processor performance set to "Highest" and I seldom hear the fans making much noise, although I will admit not to having very acute hearing.

My guess would be that 145∞ is near "normal" and nothing to worry about.

Smelling something overheating is another matter. I would open up the covers and sniff around for starters. I would also look for anything that appears to have been overheated.

Will do. Thanks for all the replies everyone.

Dust inside the system? It can be surprising how it can build up.

Message #8 - Posted 2006/01/06 - void * clvrmnky

On 05/01/2006 7:38 AM, ñ Colonel ñ wrote:

Every once in a while in my office I get a funny smell that reminds me of burning insulation, ozone, or of that "electrical parts cleaner" spray that you use on electric motors, armatures, etc., to get them working again. (Not sure which.)

Hard to describe the smell, but when I smell it, I think "overheating electronics."

Is this a new G5? If so, it make take some time for the "new computer smell" to burn off.

Message #9 - Posted 2006/01/06 - Mathue

Previously, Randy Howard wrote:

Well, Im using the first version of the Dual 1.0 Gig G5, and my Memory Controller Heatsink generally runs between 144.9 and 145.2 oF with no really serious computing going on -- Activity monitor showing CPU activity at 4 to 6%.

I seem to get about 145, pretty much regardless of the workload. What is interesting, is I did an experiment where I opened a window (directly next to the chassis) on a very cold nite, and let it suck cold air straight into the front of it. The whole front of the aluminum chassis was cold to the touch, and the temperature sensor didn't change. So, I suspect it would take a LONG time to "cold soak" the chassis enough to make a dent in the proc temp sensor. So, I don't even worry about it anymore.

Here's what readings I get reading usenet.

CPU A Die Temperature 153.5oF
CPU B Die Temperature 160.3oF
Drive Bay 73.4oF
Main Logic Board Backside 109.6oF
Memory Controller Heatsink 151.7oF
Processor Card A Ambient 71.2oF
Processor Card B Ambient 72.0oF
CPU A Exhaust Fan 841 RPM
CPU A Intake Fan 815 RPM
CPU A Radiator Pump 1250 RPM
CPU B Exhaust Fan 841 RPM
CPU B Intake Fan 815 RPM
CPU B Radiator Pump 1250 RPM
Drive Bay 1000 RPM
Main Logic Board Backside 20.0 %
PCI Slot Fan 38.0 %

MT - Diagonally parked in a parallel universe.

101010

Message #10 - Posted 2006/01/06 - dfritzin

Richard Tomkins wrote:

This is a good question.

I looked around and find a lot of IC's spec's at -35 to +85 degrees C.

So, 145 degrees F is 63 degrees C, so in fact, you may be in the operating range.

It would be nice to hear from others who use the same tool what temperatures that they are observing.

rtt

This is odd. I am running the widget MiniCPUHeat on a RevA PM G5/dual 2.0 and on a iMac G5/2.0/20. On the PM, the temperature never goes above about 28 deg. C., while on the iMac, the temperature is about 135 deg C (57 deg C) when I start up the computer. Anyone know why there is this difference?

Thanks,

Dave Fritzinger
Honolulu, HI

Message #11 - Posted 2006/01/08 - ? Colonel ?

On 2006-01-06 09:56:33 -0500, Randy Howard said:

How new is the OP's system? When new, you often smell this for a while.

No, it's over a year old now. Oh, well, the smell hasn't returned. I'm wondering wheter it's ozone...?

Need Help? Have a Question?

Looking for more help, comments, and answers?

Ask your questions on Ask Different. Ask Different is a community of Apple users ready to help.