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From: The Natural Philosopher <t...@invalid.invalid>
Newsgroups: comp.os.linux.setup
Subject: Re: Intel Atom and graphics
Date: Sun, 11 Nov 2012 11:10:01 +0000
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On 11/11/12 03:18, Chris Cox wrote:
> On 11/09/2012 12:25 PM, Patrick wrote:
>> Hi,
>>
>> Using a netbook with an Intel Atom 1.6 single core dual thread processor.
>>
>> When playing music or black and white movies the machine runs in the mid
>> 60's celsius, no problem.  When playing color movies the machine runs
>> in the
>> mid 70's celsius which is at the upper range of it's heat range.
>>
>> It does not miss any frames, the graphic quality is very good playing
>> color
>> movies.  glxgears shows it is producing 60 fps so overall it is doing the
>> graphics OK.
>>
>> The question is, is there any graphics adjustment available lowering
>> graphics
>> quality slightly to reduce the heat factor when playing color movies
>> ?    Most
>> movies are two hour movies, etc..
>>
>> Secondly, is there a laptop computer with processor/graphics
>> capability which
>> does these color movies at a normal, less than max, heat range ?     I
>> don't
>> want to max out the processor all the time playing these, and would
>> consider
>> different computer to do so.   But, like I said, music and black and
>> white
>> movies are playing just fine with everything running in the normal
>> range.   It's
>> like it was made for those but not the color movies.
>>
>> THX.
>>
>>
>> patrick
>>
>
> 70C sounds within range.  A lot of Atoms break down (and even then, it's
> not a guaranteed breakdown, more of a documented safety point) at 90C.
>
> Do you have the specs for the particular Atom you are using?
>
> If there's a cooling issue with the design of the netbook.. well.. it's
> a cooling issue.  You might be able to force a speed reduction (speed
> stepping) at lower temperature threshold.. but obviously the cost will
> be reduced performance.
>
> Most CPUs take a lot more heat than most people can actually tolerate...
> (in other words, some are designed to run pretty darn hot even if it
> looks scary to us).
>

Indeed. Silicon junctions go AWOL at 180C-200C

I have melted the solder off a diode - connected accidentally across a 
battery-  which survived!

In general the ageing process is excponetial with temperature. Lifetimes 
at 90C plus are reduced from thousands of years to just tens typically.

And chip specs start to drift..

But the main reason to keep temps dowon is to stop the chip from going 
out of spec - typically propagation delays change and at a given point 
the chip stops working.

It may start working again if left to cool. Or not. In my experience 
half a dozen SPARC computers had fans go after a few years. Replacing 
the fans got all but one working: That needed a new CPU.



-- 
Ineptocracy

(in-ep-toc’-ra-cy) – a system of government where the least capable to 
lead are elected by the least capable of producing, and where the 
members of society least likely to sustain themselves or succeed, are 
rewarded with goods and services paid for by the confiscated wealth of a 
diminishing number of producers.