Gui Miner issues with 3 GPU's

[kristoff]

Hello all, im fairly new to bitcoin mining. But i have stumbled upon an issue i think is worth posting about, because i have no idea what would cause it.

As you can see from the picture below, all 3 of my 5830's have been mining for about 20min, but for some reason gpu 2 isnt quite up to speed with 1 & 3. Is this a problem anyone else is having or is it some kind of settings issue?


settings are as follows

aggression = 7
phatk kernel
worksize 256



http://i5.photobucket.com/albums/y189/azngifts/guiminererror.jpg

[1715503010]

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[pokermon919]

You sure the OS see all 3 cards and the 2nd miner isn't on cpu?

[kristoff]

yes guiminer sees 3 GPUs, catalyst control center sees 1 primary GPU and 2 additional GPU are active, CPU mining is not selected. It just slowly over time falls behind the other 2 GPUs 

[Ilikeham]

Depending on the physical layout of the cards in the rig, the middle card might have restricted airflow and be thermally throttling itself. I don't mine, but I competitively overclock and that issue in not uncommon with air cooled multi card layouts. Put a house fan pointed directly into the open side of case and see if the problem is resolved, if so, you know what it is.

[pokermon919]

If the temps are high on the 2nd gpu then what Ilikeham said would likely be true.