[Thinkpad] T20 CPU temp

[gwydion]

Bruce -

Do me a favor:  download the utility at 
http://www.geocities.co.jp/SiliconValley-Oakland/8259/release/0200/mm0200.zip 
and try it on a thinkpad or two.  Run some CPU intensive programs and see 
if the results you get track what you think should be happening.  I've 
tried the utility on 3 different thinkpad models, and I believe it works.

As for the heat issue with the T20, it is a T20 retrofitted w/ a 1G 
processor.  In certain situations (i.e., high CPU load for extended 
period) it will shut itself off.  No warning, just turns off.  This is 
repeatable.  It corresponds to the same situations that the utility 
referred to above shows very high temps.  Like Shingo, I see temps in 
excess of 90c.  The highest I've seen is 97c, but I have not set it up to 
monitor to shut-off.  What I do see is that the frequency will step down 
at higher temps, e.g. when it exceeeds 95c the frequency will drop even if 
it is working at full load w/o any slack.  My guess is that if the temp 
spikes too high, there is some kind of protective response that just shuts 
everything off.

The air coming out of the vent is very hot, but not hot enought to burn.  
Actually, I think one of the problems is that the fan just doesn't move 
eough air; the air voloume is noticably less that my T30.

Art



On Sat, 6 Dec 2003 23:32:19 -0500, Bruce Markowitz 
<scosgt at worldnet.att.net> wrote:

> First of all, I seriously doubt this is a problem. I have personally 
> never seen a CPU fail on a T series. I use up to 1 gig CPU's
> The heat pad is an IBM factory spec.
> On later machines I have opened up, they generally use white thermal 
> grease. > You can also use Artic Silver thermal compound, I find it 
> works very well.
> Just remember to replace it with white grease if you need to send it in 
> for warranty service.
> HOWEVER, I think you are worrying about nothing.
> It really does not generate that much heat. The utility is probably 
> wrong, or just plain fake.
> If the CPU was up around 200 degrees, you would get a nice burn putting 
> your hand by the vent. While there is warm air exiting the vert, even on 
> a one
> gig T22 it is not  BURNING hot.
> Worry about something else.
> Besides, 700 Mhz CPU's are available for probably $10.00 now, as this is 
> the slowest CPU (OK, I guess the 650 is slower) made in this form 
> factor. Some 800Mhz just went on Ebay for around $22.00
> That would be worth doing for that price!