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jasonk (OP)
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May 11, 2011, 09:34:35 PM |
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I just started mining last week.
I added a 2nd 5830 to my rig.
Before CPU usage was 1% on my Core i7 930.
With the 2nd GPU, my CPU is @ 14% usage when mining and when the 2nd instance of Phoenix 1.4 is open.
What should I do to get CPU usage down?
I'm on Win7 64bit.
Thanks!
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SgtSpike
Legendary
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Activity: 1400
Merit: 1005
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May 11, 2011, 09:37:24 PM |
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You can't.
It's the nature of multi-GPU mining - it'll max out at least one core. No fix for it yet.
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SlaveInDebt
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May 11, 2011, 10:17:39 PM |
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Agreed, it's the nature of the beast.
Dual 5850's do the same here on i7 regardless of cpu speed.
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"A banker is a fellow who lends you his umbrella when the sun is shining, but wants it back the minute it begins to rain." - Mark Twain
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jasonk (OP)
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May 11, 2011, 11:16:20 PM |
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What about a 3rd or 4th GPU. Will it go up another 14% and another 14% again???
How about if I had 3 GPU's on a Singl core Sempron 140, what would my CPU load be like?
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TheShoura
Member
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Activity: 98
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Testing
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May 12, 2011, 12:24:05 AM |
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it just makes the cpu 100%, or as your Core i7 has 8 threads, it will max out one thread per GPU instance when using multiple GPU I have a dual core Athlon II 3.1Ghz with 4 GPU. The CPU is at 100%, all GPU still run max Mh/s  |
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Dr. Arnold
Newbie
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May 12, 2011, 12:32:29 AM |
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Consider yourself lucky as I get 50% cpu usage with both my 6950 and 5850 mining. The best I can get is 25% usage by limiting the affinity to only 1 core for both miners.
I've heard linux doesn't have this problem though so you could try that.
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jasonk (OP)
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May 12, 2011, 05:50:09 AM |
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Can't do linux for my main system, but maybe for future builds.
Also for a dedicated system, I suppose you could disable some cores and underclock it to save on power? Or do you think this would hurt the GPU performance?
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jasonk (OP)
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May 12, 2011, 10:41:22 AM |
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Strange its now using 27%  I'm 100% sure I had both GPU's running and was only using 14% earlier today. I did start and stop phoenix several times, but still thats strange. Any clues? |
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jasonk (OP)
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May 13, 2011, 10:42:05 AM |
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Anyone have any ideas? I hate that it was working with 2 GPU's mining with 14% CPU load now its like 26%  |
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