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Hot MacBook Pro

Message #1 - Posted 2007/03/10 - zoara

Hmm.

My new shiny (MBP 2.17Ghz) often has the fan running and is pretty hot on my lap. CoreDuoTemp reports 51C.

Is this normal? Can I throttle down the CPU speed (while on mains as well as on battery) to avoid the fans coming on?

-zoara-

"I'm sorry, that's not a hair-related question."

Message #2 - Posted 2007/03/10 - Ian Robinson

On Sat, 10 Mar 2007 23:30:00 +0000, zoara wrote (in a previous article):

My new shiny (MBP 2.17Ghz) often has the fan running and is pretty hot on my lap. CoreDuoTemp reports 51C.

Is this normal?

Yes. The fans are pretty quiet on my MBP 17 though.

Ian

Ian Robinson, Belfast, UK
<http://www.canicula.com/wp/>

Message #3 - Posted 2007/03/11 - Randall Assworth

Previously zoara wrote:

Hmm.

My new shiny (MBP 2.17Ghz) often has the fan running and is pretty hot on my lap. CoreDuoTemp reports 51C.

Is this normal? Can I throttle down the CPU speed (while on mains as well as on battery) to avoid the fans coming on?

Just put on an asbestos athletic supporter, Mr. Hotnuts.

-zoara-

--
"I'm sorry, that's not a hair-related question."

Message #4 - Posted 2007/03/11 - Annie Seedballs

On Sat, 10 Mar 2007 23:30:00 +0000, zoara wrote (in a previous article):

Hmm.

My new shiny (MBP 2.17Ghz) often has the fan running and is pretty hot on my lap. CoreDuoTemp reports 51C.

Is this normal? Can I throttle down the CPU speed (while on mains as well as on battery) to avoid the fans coming on?

-zoara-

I'm using iStat (you can find it at the Apple widget page) and it's reporting the CPU temp at 60C - and the fans aren't running at all (this is a 17", so YMMV).

I've had the temperature hit 75C+ without detriment. There are always these gadgets that claim to allow air to circulate round the unit, whilst keeping your lap cool, but I've never read a review of any, so I don't know how good they actually are.

Sarah

Message #5 - Posted 2007/03/12 - Rexx Magnus

On Sat, 10 Mar 2007 23:30:00 GMT, zoara wrote:

Hmm.

My new shiny (MBP 2.17Ghz) often has the fan running and is pretty hot on my lap. CoreDuoTemp reports 51C.

Is this normal? Can I throttle down the CPU speed (while on mains as well as on battery) to avoid the fans coming on?

-zoara-

I use smcfancontrol, but this is just to speed fans up to cool it down. I don't know how to throttle the CPU.

It shouldn't feel that hot at ~50C though.

The standard rpm for the fans on mine (1.8 MBP 15") seem to be around 900-1000 when idling (it's not very audible) and is about 45- 50c.

http://www.rexx.co.uk To email me, visit the site.

http://www.rexx.co.uk/runes/ - personal online rune readings

Message #6 - Posted 2007/03/12 - Rexx Magnus

On Sun, 11 Mar 2007 13:08:20 GMT, Annie Seedballs wrote:

I'm using iStat (you can find it at the Apple widget page) and it's reporting the CPU temp at 60C - and the fans aren't running at all (this is a 17", so YMMV).

I've had the temperature hit 75C+ without detriment. There are always these gadgets that claim to allow air to circulate round the unit, whilst keeping your lap cool, but I've never read a review of any, so I don't know how good they actually are.

Sarah

I run mine on a homemade stand with space under the centre of it - just to give it free airflow. The fans are on all the time, but not so you can really hear them. When I play games though, it'll go up to about 75C and then the fans will kick in to about 1600-1800 rpm. I'll sometimes use smcfancontrol to turn the speed up so that it runs a bit cooler though.

http://www.rexx.co.uk To email me, visit the site.

http://www.rexx.co.uk/runes/ - personal online rune readings

Message #7 - Posted 2007/03/12 - zoara

On Sat, 10 Mar 2007 23:38:18 +0000, Ian Robinson wrote:

On Sat, 10 Mar 2007 23:30:00 +0000, zoara wrote (in a previous article):

My new shiny (MBP 2.17Ghz) often has the fan running and is pretty hot on my lap. CoreDuoTemp reports 51C.

Is this normal?

Yes. The fans are pretty quiet on my MBP 17 though.

Right. I think there *may* be something funny going on because the fans can sometimes ramp up to full (still registering 50-odd deg) but it might be me blocking the vents. If I have it on a desk, when the fans come on they are pretty quiet (but aren't on full).

I'll keep an eye on the bugger.

-z-

My God, it's full of asterisks.

Message #8 - Posted 2007/03/12 - zoara

On Sun, 11 Mar 2007 13:08:20 +0000, Annie Seedballs wrote:

On Sat, 10 Mar 2007 23:30:00 +0000, zoara wrote (in a previous article):

Hmm.

My new shiny (MBP 2.17Ghz) often has the fan running and is pretty hot on my lap. CoreDuoTemp reports 51C.

Is this normal? Can I throttle down the CPU speed (while on mains as well as on battery) to avoid the fans coming on?

I'm using iStat (you can find it at the Apple widget page) and it's reporting the CPU temp at 60C - and the fans aren't running at all (this is a 17", so YMMV).

Okay, thanks. I have downloaded iStat (by God, the 'default' skin is fugly) and appreciate the recommendation - looks useful for non-temperature stuff as well.

I've had the temperature hit 75C+ without detriment.

But the fans have been on, right?

There are always these
gadgets that claim to allow air to circulate round the unit, whilst keeping your lap cool, but I've never read a review of any, so I don't know how good they actually are.

IMO they also lost you half the benefits of a notebook; if I have to think ahead and tote a lap-tray around the house too, then I may as well give up and go with a desktop :)

-z-

"The only way to have fun with a Mac is to
poke its insufferable owner in the eye."
- Charlie Brooker

Message #9 - Posted 2007/03/12 - Ian Robinson

On Mon, 12 Mar 2007 11:31:55 +0000, Rexx Magnus wrote (in a previous article):

I use smcfancontrol, but this is just to speed fans up to cool it down

That's pretty cool. He said, not even trying to avoid the pun!

Ian

Ian Robinson, Belfast, UK
<http://www.canicula.com/wp/>

Message #10 - Posted 2007/03/12 - Jaimie Vandenbergh

On 12 Mar 2007 11:31:55 GMT, Rexx Magnus wrote:

On Sat, 10 Mar 2007 23:30:00 GMT, zoara wrote:

My new shiny (MBP 2.17Ghz) often has the fan running and is pretty hot on my lap. CoreDuoTemp reports 51C.

Is this normal? Can I throttle down the CPU speed (while on mains as well as on battery) to avoid the fans coming on?

I use smcfancontrol, but this is just to speed fans up to cool it down. I don't know how to throttle the CPU.

CoolBook Controller will do this - but the freebie version will probably show your CPU is running at minimum speed most of the time anyway, mine does.

Installing the developer tools (CHUD, I think) gives you a CPU control thing that allows you to turn off a core.

Cheers - J

Rule #87: If the thought of something makes me giggle for longer than 15 seconds, I am to assume that I am not allowed to do it. -- www.skippyslist.com

Message #11 - Posted 2007/03/12 - Rexx Magnus

On Mon, 12 Mar 2007 12:22:04 GMT, Jaimie Vandenbergh wrote:

CoolBook Controller will do this - but the freebie version will probably show your CPU is running at minimum speed most of the time anyway, mine does.

Installing the developer tools (CHUD, I think) gives you a CPU control thing that allows you to turn off a core.

Cheers - J

CHUD does something odd though, at least it seems to now. It seems to make the computer get hotter - I think this was an issue that I noticed after one of the most recent SMC firmware updates that fixed the hiss. The load balancing is better now, so turning one core off actually puts more strain on one of them.

I don't really use CHUD now though, the only thing I needed it for was Audacity.

http://www.rexx.co.uk To email me, visit the site.

http://www.rexx.co.uk/runes/ - personal online rune readings

Message #12 - Posted 2007/03/12 - Tim Auton

zoara wrote:

Hmm.

My new shiny (MBP 2.17Ghz) often has the fan running and is pretty hot on my lap. CoreDuoTemp reports 51C.

The fans may not be being triggered by the CPU temperature.

I've no details on the MBP, but I now have carnal knowlege of the thermal controls in an iBook and that (well, the ADT7467 inside it) monitors all three of its temperature sensors, each with a different threshold, and kicks the fan on when any of them reach their threshold. My CPU never reaches its threshold, it is always the sensor on the bottom of the motherboard under the RAM which gets there (56 C) first. Something similar may be happening with your MBP.

Tim

Message #13 - Posted 2007/03/13 - D.M. Procida

Tim Auton wrote:

My new shiny (MBP 2.17Ghz) often has the fan running and is pretty hot on my lap. CoreDuoTemp reports 51C.

The fans may not be being triggered by the CPU temperature.

I've no details on the MBP, but I now have carnal knowlege of the thermal controls in an iBook and that (well, the ADT7467 inside it) monitors all three of its temperature sensors, each with a different threshold, and kicks the fan on when any of them reach their threshold. My CPU never reaches its threshold, it is always the sensor on the bottom of the motherboard under the RAM which gets there (56 C) first. Something similar may be happening with your MBP.

It could be some interminable Spotlight indexing which is triggering it.

Daniele

Message #14 - Posted 2007/03/13 -

Annie Seedballs wrote:

SNIP>

This poster is Sarah Balfour/Margolotta/Mentally Sub-Normal You all know what she is about, and she dosen't own a MBP.

Message #15 - Posted 2007/03/14 - zoara

On Tue, 13 Mar 2007 10:57:36 +0000, D.M. Procida wrote:

Tim Auton wrote:

My new shiny (MBP 2.17Ghz) often has the fan running and is pretty hot on my lap. CoreDuoTemp reports 51C.

The fans may not be being triggered by the CPU temperature.

I've no details on the MBP, but I now have carnal knowlege of the thermal controls in an iBook and that (well, the ADT7467 inside it) monitors all three of its temperature sensors, each with a different threshold, and kicks the fan on when any of them reach their threshold. My CPU never reaches its threshold, it is always the sensor on the bottom of the motherboard under the RAM which gets there (56 C) first. Something similar may be happening with your MBP.

It could be some interminable Spotlight indexing which is triggering it.

Not in my case. I can ramp the fans up or down by starting and stopping the screensaver.

-z-

My God, it's full of asterisks.

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