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Change # of Processors Problem

5/3/2008 11:06:07 AM

carp

46 posts

Change # of Processors Problem
(N/A) Modified By carp on 5/3/2008 1:06:26 PM)

I wanted to see if my stock CPU fan could keep things in check with all 4 cores crunching. When I changed the # of processors in BOINC it caused all my work units in progress to go to 100% complete when they indeed were not. Normal or should I be suspending all the projects first. Lost about half the credt of 4 WUs.

Anyone here ever use the ZALMAN 8500/8700 low profile CPU fans for stock cooling. I really don't like the way this ACER doesn't mind letting temps stay at 60C+ on this quad core.

5/3/2008 12:26:25 PM

Kinguni

2106 posts

Re: Change # of Processors Problem
(Canada)

I'm no help on either item, but I can't see that running on less than a 4 cores would actually cut the heat much, since after all, each core generates it's own heat. If you want it to run cooler you need to set a parameter on a project site for computing preferences for how much CPU time BOINC can use.

5/3/2008 8:09:35 PM

skildude

209 posts

Re: Change # of Processors Problem
(N/A)

I had to change my cpu # from 1 to 4 and I don't recall having to suspend processes to do that. I think this a a fluke. If you'd like to test a theory then without suspending work... change back the CPU # to 1 then change it back to 4 again and see what happens.

5/3/2008 9:34:03 PM

paul

1024 posts

Re: Change # of Processors Problem
(N/A)

Is the stock hsf an Intel one, or Acer's design? Either way, is there options in bios for some type of speed control for the fan, you may be able to disable it so the fan will stay on high speed. The Zalman line is known for looks and being quiet, there are better performing hsf's out there for the price. Four cores going flat out crunching will generate some heat, and you've seen that it has to go somewhere. Perhaps adding a front fan and maybe a faster exhaust fan would be an option, to remove the heat from the case, along with a better cpu cooler.

Co-owner, the Group of 10 ~~100~~ ~~200~~ 300

5/5/2008 5:10:51 AM

carp

46 posts

Re: Change # of Processors Problem
(N/A)

I can disable the smart fan in BIOS. Didn't get a chance to pop the case open yet,.

5/6/2008 7:43:27 AM

carp

46 posts

Re: Change # of Processors Problem
(United States) Modified By carp on 5/6/2008 9:45:05 AM)

Ah, life is much better. I disabled smartfan in BIOS and man did them fans roar. Not good. Speedfan cured the problem once I actually found the help file for the program. Fan's controlled by smartguardian but problem was couldn't set desired temp below 60C in the BIOS. Left this morning with CPU fan set to minimum 40% max and case fan 50% max and letting speedfan adjust if things hit 50C. I set minums higher because the fan cycling was driving me nuts. Fans will go 100% at 60C. When I left the house two cores were low 40's and two high 30's crunching on two cores. Much better than my mid 60's. Noticed the fins of the heat sink are pretty crudded up. May clean them up and make a filter out of bulk filter material I have. The CPU fan either sits in or has a tube on top that runs from the side of the case to the fan.

No luck overclocking this ACER MB. Can't get BIOS unlocked and don't know which clock generator the board uses. And no AMI BIOS ID string displays at boot. OH well.

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