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Author Topic: Third GPU causing problems?  (Read 667 times)
newminerr
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August 23, 2011, 05:34:10 PM
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The long story:

So i am running ubuntu 11.04, i had 3 6950 GPU's but couldn't run them stacked -sandwitched- the heat was killing the top card so i ran two GPUs and leaving the third on the box, and ordered the 16x extender and 14 days later -that's yesterday- i got it.

I was kinda shocked that the extender is so fricking short!!!!
Couldn't really get the GPU away from the MOBO, and since the crossfire bridge is short aswell i ended up laying the GPU on it's side...

Anyway i crossfired them and re-initiated X to rebuild the conf file then rebooted.

The third GPU was detected and i ran three instances of phoenix and everything was cool.

After many hours i came back to find only two phoenix instances have 1000+ shares and the other have only 100 shares, and no error messages, and for some reason i can't ctrl+c the bash screen..

Did it again and waited some hours -actually was @ work- and checked it again, same problem.

Note #1: GPU #0 is always fine, GPU #1 is the one doing that, GPU #2 is fine.
Note #2: GPU #1 -second- Won't get flashed, unlike the other GPU's
Note #3: The second -#1- GPU was working fine without adding the third GPU.
Note #4: The GPU's are identical MSI R6950 Twin Frozr III cards.
Note #5: GPU #1 -second- always has the lowest temp, and it is in the bottom position.

TL;DR version:
After added a third GPU the second one won't function properly and it won't mine after a certain time.

Thanks for any help on this.
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deslok
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August 23, 2011, 05:40:55 PM
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Why are you using a crossfire bridge?

"If we don't hang together, by Heavens we shall hang separately." - Benjamin Franklin

If you found that funny or something i said useful i always appreciate spare change
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newminerr
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August 23, 2011, 05:44:47 PM
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Why are you using a crossfire bridge?
To be able to use the 3?  Huh
I asked the guy who sold me the GPU's he said i have to crossfire each.
deslok
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August 23, 2011, 05:55:23 PM
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If you were playing games with them yes for mining get rid of it.

"If we don't hang together, by Heavens we shall hang separately." - Benjamin Franklin

If you found that funny or something i said useful i always appreciate spare change
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newminerr
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August 24, 2011, 01:19:27 AM
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If you were playing games with them yes for mining get rid of it.
That worked!!
Thanks a lot mate!

I sent you a penny Cheesy i wish i had more in my wallet Wink
deslok
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August 24, 2011, 02:17:00 AM
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If you were playing games with them yes for mining get rid of it.
That worked!!
Thanks a lot mate!

I sent you a penny Cheesy i wish i had more in my wallet Wink

not a problem man and with 3x6950 you should have far more than that in no time!

"If we don't hang together, by Heavens we shall hang separately." - Benjamin Franklin

If you found that funny or something i said useful i always appreciate spare change
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