Is CharityEngine/BOINC only able to use 1 GPU at a time?

I have a GTX 780 as the primary display and a pair of GTX 580's for extra CUDA grunt (primarily for rendering), but BOINC only uses the 780.

The 580's aren't in SLI, and neither is the 780.

BOINC is only detecting your GTX 780, and without BOINC detection we can't really do anything.

By default BOINC chooses the best card and only uses it; you may wish to create a cc_config.xml file in the BOINC directory with this content, and force a reread of the prefs file or restart the client:

<cc_config> 
    <options> 
        <ncpus>0</ncpus> 
        <use_all_gpus>1</use_all_gpus> 
    </options> 
</cc_config> 

Hopefully BOINC detects all GPUs then.

Please let me know if you need any help in any of these steps, and if it works as intended.

Excellent, that's done it; thanks!

Thanks! I was just having the same issue.

How do you do it in Ubuntu 12.04.3 (x86_64).

Boinc Manager ver. 7.0.27 (x86) wxWidgits 2.8.12

I've done it before in Windows 7 pro (64) hidden folder: Program Data--> Boinc--> etc.  something like config.xml

Bruce G.

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I found cc_config.xml but now it is different.

The web page for help doesn't work

<!--

This is a minimal configuration file cc_config.xml of the BOINC core client.

For a complete list of all available options and logging flags and their

meaning see: http://boinc.berkeley.edu/trac/wiki/ClientMessages

-->

<cc_config>

  <log_flags>

    <task>1</task>

    <file_xfer>1</file_xfer>

    <sched_ops>1</sched_ops>

  </log_flags>

</cc_config>

I need to run a Nvidia card and 15 cpu's

I think I have the problem solved but have not yet received a GPU work unit to affirm.

I have a AMD A10-6800 APU running GPU and 1 core.

There was a slight hitch. If the Einstein was doing a GPU then Charity tried starting up GPU and in 4 seconds Charity would fail. For now I suspended Einstein but tomorrow will try rewriting the Einstein cc_config.xml in the hidden folder Program Data to exclude the GPU work units on the AMD A10-6800.