BOINC isn't using my second GPU: How can I do work on a second GPU?
log in

Advanced search

Message boards : Windows : BOINC isn't using my second GPU: How can I do work on a second GPU?

Author Message
DavidVR
Send message
Joined: 8 Jan 11
Posts: 4
Credit: 4,136,270
RAC: 0
Message 12592 - Posted: 18 Jul 2011, 20:39:11 UTC

I have a GTX 260 and a 9500 GT. BOINC only uses the GTX 260 for work, despite the fact that both GPUs have CUDA and seem to have the necessary drivers. How can I get BOINC to use the 9500 GT?

Profile mikey
Avatar
Send message
Joined: 11 Aug 09
Posts: 3242
Credit: 1,690,477,802
RAC: 5,797,500
Message 12596 - Posted: 19 Jul 2011, 11:27:21 UTC - in response to Message 12592.

I have a GTX 260 and a 9500 GT. BOINC only uses the GTX 260 for work, despite the fact that both GPUs have CUDA and seem to have the necessary drivers. How can I get BOINC to use the 9500 GT?


IF these are in the same pc you need to do two things, you need to hook up a 2nd monitor to the 2nd card when the pc boots up or make yourself a plug that fixes that problem. AND you need to put in a cc_config.xml file that looks like this:

<cc_config>
<options>
<use_all_gpus>1</use_all_gpus>
</options>
</cc_config>

The cc_config.xml file goes into a SPECIFIC Boinc folder depending on what OS you are using and must be made in NOTEPAD in Windows if you use Windows!!! A standard word processing program adds stuff that Boinc can't read. The 'use all gpus' coding means to use all the gpu's the system finds. PM the user Claggy and he will give you the specifics on where the file goes.

DavidVR
Send message
Joined: 8 Jan 11
Posts: 4
Credit: 4,136,270
RAC: 0
Message 12599 - Posted: 19 Jul 2011, 18:45:52 UTC - in response to Message 12596.

Okay, thank you very much for your help. I was hoping I wouldn't have to make a dummy plug but it seems I have to. Thank you.

Profile Beyond
Avatar
Send message
Joined: 30 Jul 09
Posts: 213
Credit: 939,653,252
RAC: 3,969
Message 12600 - Posted: 19 Jul 2011, 19:31:52 UTC - in response to Message 12599.

Okay, thank you very much for your help. I was hoping I wouldn't have to make a dummy plug but it seems I have to. Thank you.

Don't think you need a dummy plug for NVidia with halfway recent drivers. Use the cc_config.xml above and also extend your desktop.

Profile mikey
Avatar
Send message
Joined: 11 Aug 09
Posts: 3242
Credit: 1,690,477,802
RAC: 5,797,500
Message 12603 - Posted: 20 Jul 2011, 11:06:50 UTC - in response to Message 12599.

Okay, thank you very much for your help. I was hoping I wouldn't have to make a dummy plug but it seems I have to. Thank you.


The dummy plug is EXTREMELY easy to make, I bought the parts at my local Radio Shack for less than 5 bucks, then it took less than 5 minutes to make one!

Profile mikey
Avatar
Send message
Joined: 11 Aug 09
Posts: 3242
Credit: 1,690,477,802
RAC: 5,797,500
Message 12604 - Posted: 20 Jul 2011, 11:08:23 UTC - in response to Message 12600.

Okay, thank you very much for your help. I was hoping I wouldn't have to make a dummy plug but it seems I have to. Thank you.


Don't think you need a dummy plug for NVidia with halfway recent drivers. Use the cc_config.xml above and also extend your desktop.


I did not know there was a difference between AMD and Nvidia as far as needing the plug was concerned. I am using two AMD cards in one machine, not two Nvidia cards. Hmmmm that is interesting though.

Profile Beyond
Avatar
Send message
Joined: 30 Jul 09
Posts: 213
Credit: 939,653,252
RAC: 3,969
Message 12607 - Posted: 21 Jul 2011, 22:43:17 UTC - in response to Message 12604.

Don't think you need a dummy plug for NVidia with halfway recent drivers. Use the cc_config.xml above and also extend your desktop.

I did not know there was a difference between AMD and Nvidia as far as needing the plug was concerned. I am using two AMD cards in one machine, not two Nvidia cards. Hmmmm that is interesting though.

NVidia corrected the problem long ago. Not only that but for machines that have 1 ATI and 1 NVidia: always put the ATI in the master PCIe slot and the NVidia in another slot. Hook the monitor to the ATI and you will also NOT need a dummy plug for the NVidia. This is assuming halfway recent drivers (for sure 258.96 and newer). You MUST always extend the desktop however.

Profile mikey
Avatar
Send message
Joined: 11 Aug 09
Posts: 3242
Credit: 1,690,477,802
RAC: 5,797,500
Message 12608 - Posted: 22 Jul 2011, 11:08:11 UTC - in response to Message 12607.

Don't think you need a dummy plug for NVidia with halfway recent drivers. Use the cc_config.xml above and also extend your desktop.

I did not know there was a difference between AMD and Nvidia as far as needing the plug was concerned. I am using two AMD cards in one machine, not two Nvidia cards. Hmmmm that is interesting though.


NVidia corrected the problem long ago. Not only that but for machines that have 1 ATI and 1 NVidia: always put the ATI in the master PCIe slot and the NVidia in another slot. Hook the monitor to the ATI and you will also NOT need a dummy plug for the NVidia. This is assuming halfway recent drivers (for sure 258.96 and newer). You MUST always extend the desktop however.


Thanks I did not know that!!


Post to thread

Message boards : Windows : BOINC isn't using my second GPU: How can I do work on a second GPU?


Main page · Your account · Message boards


Copyright © 2018 Jon Sonntag; All rights reserved.