I guess I shouldn't be complaining since my computer does relatively well for a laptop but I've been noticing that recently what usually took me 3 hours to crunch now goes anywhere from 5-8 hours, one even took 10 hours to do. I'm still using Boinc 4.19, 4.45 completely crashes my laptop to the point where I have to disconnect the power cord and remove the battery pack. My computer gets rather hot and the fans run constantly at high speeds, response becomes sluggish. Earlier, someone suggested that I elevate the base so air could go through the bottom and to an extent it helps but still it occurs. I understand the weather, now being the dog days of summer, coupled with the fact that I live in Hawaii (lucky me?), but if there is any other ideas out there to at least mitigate the heat so I can crunch more effectively, that would be appreciated. The rear of the laptop is elevated at about 1.15 inches sloping down on a hard koa desk in the shady corner of my room, away from heat but where drafts circulate. Daytime temps reach maybe 92-94F with a kicker given the room heating.

Thanks for any advice!

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my althon xp2200 laptop does the same thing. I hear there's a thermal diode on the processor which slows it down during overheating, and another which shuts it down if it gets just too hot. While it was in michigan with no A/C it constantly ran slow. Now it's back in South Carolina nestled over an A/C vent and my times have improved. Elevating it only helps when the fan and vents are clean. My laptop needs disassembly cleaning and new compound to get back to normal. It sounds like yours does as well.

Afraid the best advice I can give is "don't run it when the ambient temp is 90+ F". I don't think I would run my desktop in that kind of environment, let alone my laptop! No air conditioning in Hawaii? I like to keep CPU temperatures in the 40 C (~100F) range. With ambient temps already approaching that the CPU temp will skyrocket.

However if you are hell-bent on abusing your systems... :) You might look into getting a program that will let you control the frequency scaling of your laptop's CPU manually. When not in use, my laptop's CPU switches from 1.3 GHz down to 600 MHz. If I use a program (I8kfanGUI - only works on some Dells I think) to lock it at 600 MHz no matter what the CPU load is, the CPU stays a LOT cooler. Of course this will also slow down your crunching - although by the sounds of it this may already be happeneing. I think all recent Intel chips have built in themal throttling that slow them down if they get too hot which would explain the jump in processing times.

Good luck :)

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A member of The Knights Who Say NI!
For rankings, history graphs and more, check out:
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I have a P3 500 MHz laptop that I think has experienced some kind of fan failure. It was really hot, and it is always tipped up and not laying flat. I was doing daily recovery consoles on it until I set a Lakewood box fan next to it. That cooled it off real good and once it's cleared off the CPDN wu's, I'll retire it. Maybe.

Pam

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I have a sony laptop fx802 and the heat is a problem to. I stop crunching when the weather gets to hot. I am now on the 3rd hard disk in 2.4 years. It may not be the processor that suffers. I used Speedfan to check the temp and the cpu runs about 29c and the hard disk about 50c. The hard disk gets to hot to touch. Other laptops I have also get dam hot.
I'm to sure they are designed to run flat out for hours/days on end.

Nairb

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I stand the laptop up on its side. The whole laptop runs cooler because of the added convection cooling of the bottom and top.
The desktop doesn't radiate heat back to the laptop.

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Red Bull Air Racing

Gas price by zip at Seti

I guess I shouldn't be complaining since my computer does relatively well for a laptop but I've been noticing that recently what usually took me 3 hours to crunch now goes anywhere from 5-8 hours, one even took 10 hours to do. I'm still using Boinc 4.19, 4.45 completely crashes my laptop to the point where I have to disconnect the power cord and remove the battery pack. My computer gets rather hot and the fans run constantly at high speeds, response becomes sluggish. Earlier, someone suggested that I elevate the base so air could go through the bottom and to an extent it helps but still it occurs. I understand the weather, now being the dog days of summer, coupled with the fact that I live in Hawaii (lucky me?), but if there is any other ideas out there to at least mitigate the heat so I can crunch more effectively, that would be appreciated. The rear of the laptop is elevated at about 1.15 inches sloping down on a hard koa desk in the shady corner of my room, away from heat but where drafts circulate. Daytime temps reach maybe 92-94F with a kicker given the room heating.

Thanks for any advice!

Stick it in the 'fridge?

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I could do that since my laptop's covered by Dell's CompleteCare for another...10 months or so but I don't think it would be nice sitting next to a vat of kim chee and milk running SETI. Would be interesting to see the times, though, since my desktop during the winter would run SETI(Classic) 24/7 at temps in the 20s and I'd be cranking out 8-10 workunits a day. Anyway, thanks for all the suggestions on how to kick my laptop up a notch. Definitely cleaning is a must and I'll even try running it on the side, though it would look odd.

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...and I'll even try running it on the side, though it would look odd.

These days I think you could probably call it "art" and probably charge people to see it. Then you could use the money to get an air conditioner!

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A member of The Knights Who Say NI!
For rankings, history graphs and more, check out:
My BOINC stats site

just a little thing to add to the comments all ready made:
DO NOT run 24/7 with the battery in your lappy it does it no good, take it OUT


B.

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[font='courier,courier new']I've run my PowerBook 24/7 for two weeks straight with the battery in, and I had no problems.

If the hottest laptops can take the heat, so can you. But I'd suggest that, just as you do yourself, give your laptop the weekend off, or at least one full day off.[/font]

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I run my P4 M laptop 24/7 and the battery is never removed.
I also use a little wire cake rack to keep it elevated a few inches above my desk. It gets great ventilation and is stable and secure to work on.

After running this way for about eight months, I opened up the board for cleaning access to the heatsink fan. There was a small plug of dust against the heatsink fan grille that was easily removed to keep airflow at maximum levels.

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You could use an add-on to limit CPU usage of the BOINC project (SETI I guess), this will keep the processor a bit cooler but will also make your WUs take a little longer.

I'm running an AMD XP2000+, with the battery in 24/7. It's been running that way for over 7 months now. I have a "Targus" dual-fan cooling pad underneath that connects to a USB port for power.

You can probably find one at any electronics store like Circuit City, Best Buy, etc. I haven't checked for one online yet, but try checking: Newegg, TigerDirect, Belkin, ZipZoomFly, SewellDirect...

I also use a can of compressed air to blow out the grilles from time to time.

(EDIT) A Quick search of Best Buy landed 2 results below: (ENDEDIT)

Targus Tornado Notebook Chill Mat Model PA248U

Targus 4-Port USB 2.0 Notebook ChillHub Model AWE01US

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No matter where you go, there you are...

Do a google on "laptop cooler".

There are shed-loads of options avaliable, with built in fans, some that use heat-pipe technology, and I am sure I found one once that used some from of "beer can cooler" car fridge technology to keep you laptop cool.

If you dont want to spend that sort of money, use a desk fan, and as others suggest, put the laptop on it's side, with the fan blowing on what would be the underside, if it was the right way up.. :)

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Foamy is "Lord and Master".
(Oh, + some Classic WUs too.)

In addition to the battery, remove whatever else you don't need that could hold heat. Mine is setup for swappable parts, and I can remove my battery and my floppy drive. Some systems also allow for removal of the CD/DVD drive, mine requires a screwdriver so I leave it alone.

Also, one of the kids left a piece of paper requiring my attention on my keyboard; the laptop overheated.

Cheers,

JJ

one of the kids left a piece of paper requiring my attention on my keyboard; the laptop overheated.

[font='courier,courier new']You could burn your fingers while typing?!?

That's one badly ventilated laptop.

.o0(And I thought I had a hot one...)[/font]

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one of the kids left a piece of paper requiring my attention on my keyboard; the laptop overheated.

[font='courier,courier new']You could burn your fingers while typing?!?

That's one badly ventilated laptop.

.o0(And I thought I had a hot one...)[/font]

Dell Insprion 8200 ... it did burn out one processor, around X-mas, but I had a faulty fan replaced with the processor and it seems to be running a bit cooler now. Love those service agreements.

Though the paper on the keyboard was with the new setup.

Cheers,

JJ

I have installed Speedfan and it shows that the temperature in my processor range between 47 and 50 degrees Celsius, after I placed my laptop (Fujitsu-Siemens Amilo L6825) on a wire baking rack. (Before I did that, it ranged between 49 - 53 degrees Celsius.)

I decided to give it a rest, now while LHC is out of work and I have WU's pending both here at Seti and at Einstein, so I shut down BOINC. And the temperature is exactly the same! The fan doens't run all the time, that's the difference!

.oO(Weirdly quiet here!!!)

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"I'm trying to maintain a shred of dignity in this world." - Me

Best way of dealing with heat on a notebooks is this extreme cooling
Notebook is an Fujitsu Siemens Amilo 1630 (Athlon64 3200+/Clawhammer, 1GB Ram)

picture´s done with a mobile phone.Sorry.

regards
Crunch3r

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