Operating temperature of pentium m

[indianduddawg47]

My friend has a dell inspiron 600m with a 1.8 ghz pentium m. He's been having some trouble in counter strike with it so I am running some tests on it. After about a half hour of cpu burn, the cpu is roughly 72C. Is that normal? What's the max temp range?

Thanks!

 

[Maximilian]

It has a max of 100*C it should be fine.

News to me that pentium M's run that hot though.... been googling the subject and not coming up with much.

 

[F1shF4t]

Wow thats hot for a pentium m. I would contact dell and tell em about this. There is no way it should be that hot. The hatsink prolly is not making proper contact with the cpu.

 

[Maximilian]

Thread about it, varying results

The OP's 1.3ghz ran at 48*C idle, a few posts down a 1.6ghz ran at the same idle, but under load would get to the 60's and 70's. Who heres got a pentium M and can confirm its meant to be running at those speeds?

Im thinking it is, its a laptop CPU, makes sense for it to have a high heat tolerance due to a tiny heatsink and fan and restrictive space.

What problems are there in CS?

 

[indianduddawg47]

Just got in some results from other friends -
one guy's pentium m runs around 82C during games, another hits 71C during a cpu burn.

These things run hot compared to my desktop's athlon 64.

 

[F1shF4t]

well they not gonna last long runing at those speed, sure makes my dually look like an icycle 30C idle woot
Now wonder the didnt pur preshot in laptops, prolly burn ur lap

 

[hardwareking]

thats kinda hot for a pentium m(dothan).They were supposed to run a lot cooler than that.

 

[Acanthus]

It is my understanding that ~70C is the throttle temp for the Pentium-M just like the P4.

Id run throttlewatch and see if the cpu is throttling back its clockspeed to stop a catastrophic overheat.

If it is throttling, contact Dell and get it serviced. If you open the case, the warrenty is void.

 

[A554SS1N]

Wow - didn't realise they ran so hot - I wonder if these means Conroe will be hot afterall?

 

[stevty2889]

Originally posted by: A554SS1N
Wow - didn't realise they ran so hot - I wonder if these means Conroe will be hot afterall?

Well they are rated up to 100c. It's likely being passivly cooled in the laptop. Mine doesn't get remotely close to those temps even overclocked, but the dinky CT-479 heatsink and fan are probably a lot more than it gets in the laptop. The temp still seems high, but it should be fairly safe. I'm not sure what the throttling temp is on a pentium-m, but I'm pretty sure it's a good bit higher than it is on a P4 since it has a higher tolerance.

 

[Acanthus]

Originally posted by: stevty2889

Originally posted by: A554SS1N
Wow - didn't realise they ran so hot - I wonder if these means Conroe will be hot afterall?

Well they are rated up to 100c. It's likely being passivly cooled in the laptop. Mine doesn't get remotely close to those temps even overclocked, but the dinky CT-479 heatsink and fan are probably a lot more than it gets in the laptop. The temp still seems high, but it should be fairly safe. I'm not sure what the throttling temp is on a pentium-m, but I'm pretty sure it's a good bit higher than it is on a P4 since it has a higher tolerance.

What makes you think the P-m on the exact same process as the P4 will have any more tolerance to heat what so ever?

 

[Maximilian]

Originally posted by: Acanthus

Originally posted by: stevty2889

Originally posted by: A554SS1N
Wow - didn't realise they ran so hot - I wonder if these means Conroe will be hot afterall?

Well they are rated up to 100c. It's likely being passivly cooled in the laptop. Mine doesn't get remotely close to those temps even overclocked, but the dinky CT-479 heatsink and fan are probably a lot more than it gets in the laptop. The temp still seems high, but it should be fairly safe. I'm not sure what the throttling temp is on a pentium-m, but I'm pretty sure it's a good bit higher than it is on a P4 since it has a higher tolerance.

What makes you think the P-m on the exact same process as the P4 will have any more tolerance to heat what so ever?

Intel specs say so. Dependant on which P4 you mean their heat tolerance is as low as 65*C in some cases. All pentium m branded CPU's can withstand 100*C. Its just a fact. I was wondering why, because i assumed the process dictated the heat tolerance, but both the 130nm and 90nm pentium M cpu's are tolerant of 100*C. Unusual.

 

[Kougar]

I have a Dell Pentium M 770 gaming laptop, and the temps to tend to climb to 60c-65c on stock voltage. The fans still cannot be heard however, and overriding the fan control improves these numbers a good bit. The problem is a laptop, even mine which has a good cooling system, can not compare to a desktop processor. Plugging a Pentium M into a desktop board and OCing to 3ghz wouldn't even stress the small cooler that came with Asus's Pentium M to 478 socket adapter.

The Pentium M, Dothan core, is indeed designed to operate within higher temps, with thermal throttling set to engage at 100c.

There are several things you can do however... I'd first recommend stripping apart that laptop and applying some AS5 to everything instead of the cheap thermal adhesive used. That seems to help things by 3-5c.

A quicker means is to simply UNDERVOLT the Pentium M. Any Pentium M can be undervolted through use of the SpeedStep technology... I personally use Notebook Hardware Control. For instance I can lock my CPU to 800mhz, and drop the voltage to the lowest setting offered of 0.700volts, and get a good improvement in battery life at no instability. For full 2.13ghz speed I dropped the voltage from ~1.35 to 1.19 and it doesn't care. The temps dropped a little over 10c alone though from this... anyone that runs Folding@Home should know it's second best to CPUBurn! at heating things up I actually have NOT tried to find the lowest voltage this chip can run on, as I don't want to push it to far. But undervolting is a great way to save on battery power and heat generation both...

 

[Maximilian]

Originally posted by: Kougar
I have a Dell Pentium M 770 gaming laptop, and the temps to tend to climb to 60c-65c on stock voltage. The fans still cannot be heard however, and overriding the fan control improves these numbers a good bit. The problem is a laptop, even mine which has a good cooling system, can not compare to a desktop processor. Plugging a Pentium M into a desktop board and OCing to 3ghz wouldn't even stress the small cooler that came with Asus's Pentium M to 478 socket adapter.

The Pentium M, Dothan core, is indeed designed to operate within higher temps, with thermal throttling set to engage at 100c.

There are several things you can do however... I'd first recommend stripping apart that laptop and applying some AS5 to everything instead of the cheap thermal adhesive used. That seems to help things by 3-5c.

A quicker means is to simply UNDERVOLT the Pentium M. Any Pentium M can be undervolted through use of the SpeedStep technology... I personally use Notebook Hardware Control. For instance I can lock my CPU to 800mhz, and drop the voltage to the lowest setting offered of 0.700volts, and get a good improvement in battery life at no instability. For full 2.13ghz speed I dropped the voltage from ~1.35 to 1.19 and it doesn't care. The temps dropped a little over 10c alone though from this... anyone that runs Folding@Home should know it's second best to CPUBurn! at heating things up I actually have NOT tried to find the lowest voltage this chip can run on, as I don't want to push it to far. But undervolting is a great way to save on battery power and heat generation both...

Amazing chip huh.

 

[Marmion]

I have a Pentium M 740, 1.73Ghz, and it runs at about 55-60C when playing AOE3 (pegged at around 90-100% CPU usage).
Idle, I'm sitting on 33C, at 800Mhz, undervolted to 0.748V (when plugged in with the fan running silently, around 20% I think), whilst on full load its undervolted to 1.116V. Notebook Hardware Control is great

 

[stevty2889]

Originally posted by: Acanthus

Originally posted by: stevty2889

Originally posted by: A554SS1N
Wow - didn't realise they ran so hot - I wonder if these means Conroe will be hot afterall?

Well they are rated up to 100c. It's likely being passivly cooled in the laptop. Mine doesn't get remotely close to those temps even overclocked, but the dinky CT-479 heatsink and fan are probably a lot more than it gets in the laptop. The temp still seems high, but it should be fairly safe. I'm not sure what the throttling temp is on a pentium-m, but I'm pretty sure it's a good bit higher than it is on a P4 since it has a higher tolerance.

What makes you think the P-m on the exact same process as the P4 will have any more tolerance to heat what so ever?

Differant architecture, and designed for mobile platforms, which genrally have less space for cooling..as well as the thermal spec..

 

[Keysplayr]

So, Acanthus says 70C is the throttle temp, and Kougar says 100C is the throttle temp. Which is it boys? Fight it out. (Not really, just find the truth)

 

[Keysplayr]

Originally posted by: Acanthus

Originally posted by: stevty2889

Originally posted by: A554SS1N
Wow - didn't realise they ran so hot - I wonder if these means Conroe will be hot afterall?

Well they are rated up to 100c. It's likely being passivly cooled in the laptop. Mine doesn't get remotely close to those temps even overclocked, but the dinky CT-479 heatsink and fan are probably a lot more than it gets in the laptop. The temp still seems high, but it should be fairly safe. I'm not sure what the throttling temp is on a pentium-m, but I'm pretty sure it's a good bit higher than it is on a P4 since it has a higher tolerance.

What makes you think the P-m on the exact same process as the P4 will have any more tolerance to heat what so ever?

It would appear that not all CPU's are created equal.

 

[Acanthus]

Originally posted by: keysplayr2003
So, Acanthus says 70C is the throttle temp, and Kougar says 100C is the throttle temp. Which is it boys? Fight it out. (Not really, just find the truth)

100C is the FAILURE temp, not the throttle temp.

 

[Acanthus]

Originally posted by: keysplayr2003

Originally posted by: Acanthus

Originally posted by: stevty2889

Originally posted by: A554SS1N
Wow - didn't realise they ran so hot - I wonder if these means Conroe will be hot afterall?

Well they are rated up to 100c. It's likely being passivly cooled in the laptop. Mine doesn't get remotely close to those temps even overclocked, but the dinky CT-479 heatsink and fan are probably a lot more than it gets in the laptop. The temp still seems high, but it should be fairly safe. I'm not sure what the throttling temp is on a pentium-m, but I'm pretty sure it's a good bit higher than it is on a P4 since it has a higher tolerance.

What makes you think the P-m on the exact same process as the P4 will have any more tolerance to heat what so ever?

It would appear that not all CPU's are created equal.

When they are created using the same technology they have very similar thermal and electrical tolerances.

 

[IsDanReally]

I'm only able to get my 1.86 GHz Pentium M to run at 75, even if I turn off the CPU fans. At that point the CPU does not throttle, but it seems the BIOS overrides my overriding fan set points.

 

[stevty2889]

Could only really find one test where some one managed to get a Dothan to throttle and it was at 83C. Others tried, got it up to 76c, and it still wasn't throttling. All of my prescotts definatly started throttling around 72-73c..and it just so happens 72.8c is the thermal spec...

 

[xgunnas32]

i dun sense a heatsink involved

 

[Acanthus]

Originally posted by: stevty2889
Could only really find one test where some one managed to get a Dothan to throttle and it was at 83C. Others tried, got it up to 76c, and it still wasn't throttling. All of my prescotts definatly started throttling around 72-73c..and it just so happens 72.8c is the thermal spec...

I dont understand what youre trying to convey...

If it throttles at 83C... thats not 100C.

All prescotts i have seen throttle around 72-73C as youve said.

From your own link:
Thermal Specification: (Also referred to as Thermal Temp) The Thermal Specification is the temperature at the critical point on the die and usually represents the hottest point on the processor. Therefore, the Thermal Specification represents the maximum temperature for reliable operation of the processor.

This is not the "throttle temp" its the "failure temp".

 

[Keysplayr]

Originally posted by: Acanthus

Originally posted by: keysplayr2003

Originally posted by: Acanthus

Originally posted by: stevty2889

Originally posted by: A554SS1N
Wow - didn't realise they ran so hot - I wonder if these means Conroe will be hot afterall?

Well they are rated up to 100c. It's likely being passivly cooled in the laptop. Mine doesn't get remotely close to those temps even overclocked, but the dinky CT-479 heatsink and fan are probably a lot more than it gets in the laptop. The temp still seems high, but it should be fairly safe. I'm not sure what the throttling temp is on a pentium-m, but I'm pretty sure it's a good bit higher than it is on a P4 since it has a higher tolerance.

What makes you think the P-m on the exact same process as the P4 will have any more tolerance to heat what so ever?

It would appear that not all CPU's are created equal.

When they are created using the same technology they have very similar thermal and electrical tolerances.

Well, that may be true. But what, besides the process of manufacturing, do a Pentium4/D have in common architectually with a Pentium M? Not much. Anyway, Stevty says he hit 76C and no throttling. The other guy had to hit 83C to get it to throttle.