CPU temperature -normal operating temperature - Gateway m450rog

Experts,

I am looking at a Gateway M450ROG laptop.  The user is explaining that the CPU fan used to come on occasionally, but now, never turns on. The fan does turn on for a few seconds during boot up, but after that, it is never heard from again.  

I installed Speed Fan and am getting a temp of 48c which is comfortable - I think.  

Does anyone know at what temperature the fan *should* turn on?  For instance, if the CPU gets to 55c, should the fan kick on?   Armed with this information, I will try to work the CPU and warm it up as a test to see if the fan / temp sensor are indeed working correctly.

Thanks..

SteveK
skacinesAsked:
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Irwin SantosComputer Integration SpecialistCommented:
how about disable any power features? that way the fan will always be on.

it could be that the bearings on the fan are clogged or need to be lubricated  OR replaced.
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nobusCommented:
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PCBONEZCommented:
That chart is cool (ahem) but it only covers desktop CPU's.
You can find the specs on yours here..
http://processorfinder.intel.com/scripts/default.asp
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MarkCommented:
Actually the list that nobus posted does have under the P4 section , the pentium M at 100C. This laptop has that processor in it, and all of the processors that you will find under the specfinder that PCBONEZ posted on the intel site that could be in this laptop, -->1.3 - 1.6GHZ<-- are all spec'd at 100C.
One other consideration is the speedstep aspect of the processor, when the laptop is on battery it will lower the CPU speed to save power and also lower the temp of the cpu . If you're going to test it better have it on ac power to sidestep the speedstep;)
I did find one other interesting fact on the Gateway site, which I have really never encountered before, they have a -->Processor Driver download.
http://support.gateway.com/support/drivers/getFile.asp?id=19200&dscr=Gateway%20M505,%20M275,%20450RGH,%20450ROG%20Processor%20driver,%20version%205.1.2600.1143&uid=118457102
I have no idea what this would be used for and no explanation is given as to its purpose. I would assume,>albeit blindly< that it has something to do with the speedstep instruction.
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PCBONEZCommented:
Noted.. P4-M .. M450ROG
100C !!!!!!!!!!!!!!!!
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skacinesAuthor Commented:
Thanks all.  Although it is still a bit of a mystery when the fan should turn on, but the temp is clearly *well* below 100C.  I would think at 100c parts of the chassis  or the nylon fan itself would probably start to soften up - and that is clearly not the case.

Thanks again!

SteveK
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MarkCommented:
Thats 100C maximum, the fan better turn on well before that.
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skacinesAuthor Commented:
Indeed.... one of these days, in my spare time while Im resting, I will test further, but since it has never gotten any warmer than 48C, I am going to table it for the moment.

I would suspect at some magic number between 55 and 75c, the fan will turn on.  

Alas, the mysteries of Gateway's.

Stevek

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PCBONEZCommented:
Just for general electronics info:
(Theory? Rule of thumb?)
The DOD (Military) requirements for general electronics equipment (diodes, caps, resistors, memory - not CPU's and not specifically PC's) are such that, unless needed for a dire emergency (a.k.a. you are getting shot at), the equipment should be shut down if the ambient temps (inside the chassis) reaches 145(ish) to 151 degrees F.
The "shut down" temps vary by the specific piece of gear and the chassis design.
What is consistant is what that's based on:
This is based on keeping the surface temps (surface of the components) below 158 F (70c) which is considered the point where insulating materials *inside* those components would start to break down and be permanently damaged from heat.
- Keep in mind this is for Military gear that's designed to be rugged and to operate in adverse conditions in the first place. Cheaper components used in some consumer electronics may not be that hearty.
.
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MarkCommented:
Well, we all live and die by the specs.  ;-)
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