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Author Topic: What do you think? FAN RPM 2x5830's (w/ pics of setup)  (Read 1668 times)
innervisi0nn
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May 28, 2011, 10:11:20 PM
 #1

Hi Guys,

Im having heating issues, once GPUminer is on, both cards run to 85-88 celicius. (too hot)
I just bought one of those desk fans and its pointed straight at the cards, no help, maybe 1-3 degrees.

Specs:
MSI 870-G45 motherboard
AMD Athlon II dual core
2GB RAM\
Scout Storm Case
1,0001 AZZA PSU
320 GB WD HD
2xXFX RADEON HD 5830 @ total of 460 Mhash/s

Note: running GUIMiner with (-v -w128)

Now I'm afraid to mess with the RPM of the fan, it was at 30% running 1500 RPM, I've cranked it to 60% at 2900 RPM (much louder of course).
It's doing 60 celcius now, cranking up the RPM won't kill my card right? What do you guys think? Am I doing anything wrong here or missing something?

If I crank it back down to 1500 RPM @30%, It'll spike to 88  celcius.

Pictures posted, thanks!



Pics from my phone turned out crappy, sorry guys.

http://i55.tinypic.com/2ly6elc.jpg
http://i56.tinypic.com/ot2s08.jpg
http://i51.tinypic.com/j9art0.jpg

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mewantsbitcoins
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May 28, 2011, 10:19:35 PM
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I personally keep fans at 100% all the time, but what helps lowering temperatures the most is lowering memory clock to ~300MHz. You can do it with MSI Afterburner. Read more about it on the Mining board
innervisi0nn
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May 28, 2011, 10:21:48 PM
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I personally keep fans at 100% all the time, but what helps lowering temperatures the most is lowering memory clock to ~300MHz. You can do it with MSI Afterburner. Read more about it on the Mining board

What does the memory clock do exactly? Im techy, but never messed with gpus before. Also, wouldn't that effect my hash rate?

grue
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May 28, 2011, 10:27:14 PM
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I personally keep fans at 100% all the time, but what helps lowering temperatures the most is lowering memory clock to ~300MHz. You can do it with MSI Afterburner. Read more about it on the Mining board

What does the memory clock do exactly? Im techy, but never messed with gpus before. Also, wouldn't that effect my hash rate?
hashing doesn't use memory

It is pitch black. You are likely to be eaten by a grue.

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mewantsbitcoins
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May 28, 2011, 10:28:44 PM
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I personally keep fans at 100% all the time, but what helps lowering temperatures the most is lowering memory clock to ~300MHz. You can do it with MSI Afterburner. Read more about it on the Mining board

What does the memory clock do exactly? Im techy, but never messed with gpus before. Also, wouldn't that effect my hash rate?

It will improve it. Try using search function. These things have been discussed 100s of times
http://forum.bitcoin.org/index.php?topic=4292.0
innervisi0nn
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May 28, 2011, 10:33:37 PM
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Thanks downloaded and installed; had to edit the .cfg file to allow messing with the clock rate.

Let's see what happens, thanks guys!

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May 28, 2011, 10:37:47 PM
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Read this again:
http://forum.bitcoin.org/index.php?topic=4292.0
innervisi0nn
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May 28, 2011, 10:46:30 PM
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I did... It mem clock at 340 just dropped my hash rate from 460 to 440.

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May 28, 2011, 10:49:33 PM
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Now that you discovered wonders of underclocking, you might as well slightly overclock your card. It is done by increasing core clock. Don't be greedy here - you'll damage your cards if you set it too high
innervisi0nn
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May 28, 2011, 10:56:02 PM
 #10

Now that you discovered wonders of underclocking, you might as well slightly overclock your card. It is done by increasing core clock. Don't be greedy here - you'll damage your cards if you set it too high

Yes, just did a max and my rig restart and froze.

So let me get this right. Drop the memory clock and increase core clock (to overclock) right?

mewantsbitcoins
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May 28, 2011, 10:58:13 PM
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Sorry - I'm not saying anything more as I don't wanna be blamed for damaged cards. Read the mining board about overclocking and underclocking before doing anything else
innervisi0nn
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May 28, 2011, 10:59:12 PM
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Sorry - I'm not saying anything more as I don't wanna be blamed for damaged cards. Read the mining board about overclocking and underclocking before doing anything else

No worries, I appreciate your help though Wink

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May 28, 2011, 11:43:15 PM
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Sorry - I'm not saying anything more as I don't wanna be blamed for damaged cards. Read the mining board about overclocking and underclocking before doing anything else

No worries, I appreciate your help though Wink
just underclock until you get the best hash rate, and overclock until it crashes Tongue

It is pitch black. You are likely to be eaten by a grue.

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innervisi0nn
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May 28, 2011, 11:52:05 PM
 #14

Sorry - I'm not saying anything more as I don't wanna be blamed for damaged cards. Read the mining board about overclocking and underclocking before doing anything else

No worries, I appreciate your help though Wink
just underclock until you get the best hash rate, and overclock until it crashes Tongue

now thats what i like to hear. doing 460 mhash/s with 310MHz memory and 800MH coreclock. 5-6 mhash increase!

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