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Petit Soleil
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Message 15757 - Posted: 20 Aug 2004, 7:39:44 UTC
Last modified: 20 Aug 2004, 7:41:14 UTC

I found this on SETI "classic" FAQ page.

QUOTE
Will running SETI@home overload or burn out my CPU?
No. The CPU on most computers is always executing instructions
(often the operating system's "idle loop") whenever the computer
is turned on. It's no additional strain to execute SETI@home.
UNQUOTE

If it's true then why my CPU temperature is 45C when
doing "idle loop" and then jump to 72C when running SETI ?
That's bullshit ! more threads = more currents = more heats

and then I found this on the CPND site.

QUOTE
Please read the technical requirements page before downloading
and installing the package. The climateprediction.net software
is quite demanding on your PC. Laptops, especially, can easily
overheat if they are performing intense operations over a long period.
UNQUOTE

It just shows more seriousness from Climat Prediction
then SETI. After reading such craps I realy wonder what is true and
what is not in SETI's posts ? (current progress, signal candidates, etc)
Not to mentionned Boinc posts.

Would SETI had 5 Millions users if they had told the
truth...???


-.-. --.- -.. -..- . - .-.-. -.- --... ...--
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Message 15762 - Posted: 20 Aug 2004, 7:51:50 UTC
Last modified: 20 Aug 2004, 8:02:06 UTC

Well first of all, the seti@home FAQ page was written several years ago and probably hasn't been updated much since then. Back then, processors produced a LOT less heat and there really was not much to worry about, even when running it hard. Today's chips have so many more transistors and run at a frequency so much higher that you have to pay more attention to cooling.

That being said, your CPU should NEVER get up to 72C when running seti if you have a halfway decent cooling system. You probably have some pre-built computer from a manufacturer who is trying to cut cost anywhere he can. 90% of users only use their computers for surfing the web and reading email. This does not put any strain on the cooling so they can get away with going cheap on the cooling system. Hoever, people who actually USE their computers will soon see the results of such cost cutting. This is why such people often build their own :) My AMD Athlon Tbird 1.4 GHz was one of the hottest processors known to mankind. (At the time at least... I think the new P4s might beat it) With a halfway decent heatsink, some thermal paste and a couple case fans, it never went over 55C while running seti@home. Dell's system (maybe others use it too) of having only a case fan and some fancy duct work to cool the CPU sucks when it comes to effectively cooling anything.

Also, please keep in mind that CPDN has VERY different requirements than seti@home. CPDN will require up to 500 MB of hard drive space and 50 MB of RAM. This will put more stress on more parts of the computer. Especially (as they mentioned) on laptops. The hard drive is one of the warmest parts of my laptop when it is being accessed a lot. This can cause heat to spread and overload the cooling systems of a laptop. And of course these crazy P4 laptops have cooling issues to begin with. I call them "crotch burners" for a reason. Go with the Pentium-M. Longer battery life, virtually the same computing power and less burned crotches :)



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Message 15765 - Posted: 20 Aug 2004, 8:06:39 UTC - in response to Message 15762.  
Last modified: 20 Aug 2004, 8:06:55 UTC

> That being said, your CPU should NEVER get up to 72C when running seti if you
> have a halfway decent cooling system.

I should have mentionned it's a laptop, a good one. CPU is P4M 1.4 GHz
Max temp according to Intel is 100C. The max I've seen so far was 85C
on a particular game. I have always use the client control on seti spy
to stop processing for 5 minutes when CPU reached 70C. I found that temp
was lower on boinc. I am also not using this laptop for crunching 24/24
7/7.

You are right about older CPU. I am participating in SETI since 2003
and I thought the FAQ page was up to date. It should be anyway.

Thanks for precision Toby

regards
Marc
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Message 15768 - Posted: 20 Aug 2004, 8:27:59 UTC
Last modified: 20 Aug 2004, 8:29:50 UTC

Ah. Well that just confirmes my "crotch burner" theory on the Pentium 4 laptops :) My Pentium-M has never gotten hotter than the low 50s, regardless of BOINC or Unreal Tournament 2004. And the whole laptop only has a single small fan that is barely audible, even at high speed. Plus, this thing will tear through a seti-classic work unit in 2:15! I love it! Haven't watched it closely enough under BOINC to see how long it takes. Laptops are a difficult problem... You have to weigh computing capacity vs. battery life vs. cooling vs. etc, etc...

Ok. No more posts on here for a while! I need to go finish an email to my family so they don't think I have died or something :)

P.S. I heard that technically they aren't allowed to be called "laptops" anymore because some guy over in England got burned in a *BAD* location after working all night with one on his lap. They are to be called "notebook computers" or something like that. FYI :)



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Message 15769 - Posted: 20 Aug 2004, 8:29:06 UTC - in response to Message 15765.  

But really, today prcoessors producing more heat as years agou when that FAQ was written. I remember that time, I registered on June 2000 and I remeber that article, I was reading that first when I start with S@H1.
But I updated my email to late in S@H1 so I had to create new account here on S@H2 on 22th june.
For example, as far as I know, new Athlon 64 has feture to save energy when it is "idling" and go low with temperature. It is really something actual in these time.
SETI@home FAQ page is really old, that true.



Try WAP user info http://slavko.sk/wap/seti
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Message boards : Number crunching : Seriousness


 
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