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Author Topic: 3 x HD 5970 + Ubuntu 11.04  (Read 980 times)
pollus
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September 01, 2011, 08:01:08 PM
 #1

Hi there,

I just got this new equipment today I installed everything and it seems to be working fine but... here is a thing:

When I start poclbm.py on once core (d0 ) i get about 360+ mhash/s if I start poclbm on any of the other 4 the other cores (why 4 - explanation below) is hitting max 15 mhash/s and d0 is decreasing to ~300.

Any ideas what is causing this behavior?

I am running SDK 2.3
and ATI drivers 11.4

 
Not second problem as upper mentioned 3 x 5970 ubuntu only sees 5 cores not 6 if I do list adapters i get this:

pollus@RIG-5970:~/Kiv-poclbm-89f9bd4$ aticonfig --list-adapters
* 0. 13:00.0 ATI Radeon HD 5900 Series
  1. 12:00.0 ATI Radeon HD 5900 Series
  2. 0b:00.0 ATI Radeon HD 5900 Series
  3. 0a:00.0 ATI Radeon HD 5900 Series
  4. 07:00.0 ATI Radeon HD 5900 Series
  5. 06:00.0 ATI Radeon HD 5900 Series

but if I test it for opencl i get this:

pollus@RIG-5970:/opt/ati-stream-sdk-v2.3-lnx64/samples/opencl/bin/x86_64$ ./CLInfo |grep CL_DEVICE_TYPE_GPU
  Device Type:                CL_DEVICE_TYPE_GPU
  Device Type:                CL_DEVICE_TYPE_GPU
  Device Type:                CL_DEVICE_TYPE_GPU
  Device Type:                CL_DEVICE_TYPE_GPU
  Device Type:                CL_DEVICE_TYPE_GPU

Only 5 devices. Any idea what might be wrong ? Is it a software or a hardware fault?

To clarify:

it is not an issue with processor ( I have 6 core AMD processor to support this rig) so it has to be something else.

Any help is appreciated.


Thank you !

Cheers

pollus

Small update,

I have eliminated the second issue it looks like the graphic card itself might be a culprit here. After I replaced it with a different one I can see all 6 cores.

I still have the other issue though.

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TeaL
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September 02, 2011, 02:22:35 AM
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You should use version 11.6 of the catalyst driver, it's faster and supports overclocking. You should also use either AMD APP SDK v 2.4 or 2.5. As for the issue it self, I believe it's related to having crossfire enabled. You can check to see if crossfire is enabled with the command:

Code:
aticonfig --lscs

You can disable it with:

Code:
aticonifg --adapter=all  --cf=off

You'll have to restart your X server for the changes to take effect tho.

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pollus
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September 02, 2011, 11:51:16 PM
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Bullseye !

Thanks for the hint. I got everything up and running now. The culprit as you said was the crossfire option enabled.

thanks for that !

Have a godo weekend.
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September 03, 2011, 06:37:49 AM
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Just glad I could help.

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