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Author Topic: Capping Hash Rates?  (Read 825 times)
demoncrest
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June 17, 2011, 09:53:45 PM
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Quick question, was just wondering if there is a way to cap the hash rate?

Most people are would be like "wtf moar is bettar" but due to personal health issues I need to keep the fans down, so I was wondering if there were flags which could be used to cap the hash rate at a certain level...

ex. I am pulling 700Mhash/s, and would want to cap it at 600Mhash/s so my GPU is not at full load and the fans will be lowered.

I've heard of -s but I dunno what the flag does, i've heard it can help though for things like this?Huh


Thanks all, and happy mining!
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bji
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June 17, 2011, 09:56:41 PM
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Quick question, was just wondering if there is a way to cap the hash rate?

Most people are would be like "wtf moar is bettar" but due to personal health issues I need to keep the fans down, so I was wondering if there were flags which could be used to cap the hash rate at a certain level...

ex. I am pulling 700Mhash/s, and would want to cap it at 600Mhash/s so my GPU is not at full load and the fans will be lowered.

I've heard of -s but I dunno what the flag does, i've heard it can help though for things like this?Huh


Thanks all, and happy mining!

If you are using Linux it's not hard do to stuff like this even if the program itself doesn't support it.  You just run a loop in a script that sends kill -STOP to your program, then waits, then kill -START, then waits, etc, etc.  It's not very fine-grained but it works.  See:

http://cpulimit.sourceforge.net/
BTC-Joe
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June 17, 2011, 10:07:27 PM
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Maybe you could underclock your GPU.
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June 17, 2011, 10:14:16 PM
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down clocking is definitely the way to go. not pausing the process!! urgs ... al the megahashes you would loose ...

aticonfig --adapter=0,1,2,3 --od-setclocks=550,900
is how I would down clock all 4 cards but don't copy this line if you have a differendt video card. use getclocks to find valid values first.

demoncrest
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June 18, 2011, 02:04:47 AM
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down clocking is definitely the way to go. not pausing the process!! urgs ... al the megahashes you would loose ...

aticonfig --adapter=0,1,2,3 --od-setclocks=550,900
is how I would down clock all 4 cards but don't copy this line if you have a differendt video card. use getclocks to find valid values first.

Hmmm alright yeah I understand that the adapter values are for which GPU and the clocks are for whatever card in the format of <core,memory> hmmm...

Any idea on how this would work with guiminer flags? I'm kind of a coding/batch/linux noob so I went with guiminer instead.

I wish I had a list of all the possible GUIMiner flags... jeez why don't they have a site even explaining these things =(
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June 18, 2011, 12:11:27 PM
 #6

you start bitcoin to get the work
you strat the miner to connect to bitcoin
you enter above command to a console to change the clocks of your video card

those are 3 different things. maybe in the catalyst you also can clock your card and monitor heat?

alkhdaniel
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June 18, 2011, 12:22:24 PM
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If you're using guiminer, try the -f flag (higher number = less usage, -f 100 is about 92% i believe)
If you're using phoenix, try the aggression flag (AGGRESSION=1 to 12, 1 being the lowest, 12 being the highest afaik, try somewhere about 5-6 to get 90% usage)

Even more retard-proof guide:
In guiminer, type -f 120 in the "flags"-box.
In phoenix, type AGGRESSION=5 at the end of the command.

Almost all miners have flags to lower usage, just look in the threads for info.
philipp
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June 18, 2011, 12:27:29 PM
 #8

Quick question, was just wondering if there is a way to cap the hash rate?

Most people are would be like "wtf moar is bettar" but due to personal health issues I need to keep the fans down, so I was wondering if there were flags which could be used to cap the hash rate at a certain level...
Thanks all, and happy mining!

Why would you want to cap the hash rate? Wouldn't it make more sense to cap the maximum temeperature and reduce load when the system gets hot and the fans get noisy instead?

Otherwise you'll have to adjust you cap all the time with temperature changes to keep the fans silent.

Philipp
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June 18, 2011, 02:26:43 PM
 #9

Your best option is toying around with '-s'.  Start out at -s0.01 and take it down in small increments till you get the hash rate you want.
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