only using 1 gpu since latest boinc update 6.6.36


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Questions and Answers : GPU applications : only using 1 gpu since latest boinc update 6.6.36

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NuclearRage
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Message 923308 - Posted: 3 Aug 2009, 4:58:43 UTC

just as the title says ... I have had little to no trouble with boinc and S@H for along time , until recent update to 6.6.36 , figured since i didn't update boinc in awhile it might be wise to do so

it ran on both gpu's before , dont get it now , only "sees" 1 and uses one

K9N2 Platinum SLI 750a MS-7374 v1.2
AMI Ver 3.2
AMD Phenom II 940
Corsair Dominator DDR@1066 (4x2gb) 5-6-6-18-25
2xXFX 9800gt using 190.38 (latest whql from nvidia)

should i uninstall boinc and reinstall the older version that worked?? or am i missing something.
the only change between working on 2 gpus and the only using one was the update to boinc

thanks for the help
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Profile Gundolf Jahn
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Message 923329 - Posted: 3 Aug 2009, 8:13:51 UTC - in response to Message 923308.

See this message for a possible workaround.

Gruß,
Gundolf

NuclearRage
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Message 923509 - Posted: 4 Aug 2009, 2:03:09 UTC - in response to Message 923329.

ok , tried the config file ... note that "</options." needed to be changed to "</options>" in order for it not to cause errors

anyhow , no effect

does say " configured to use all coprocessors " in the messages section , but still only uses and sees one.

I am running win vista home premium 64 bit with sp1 installed
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Joseph Monk
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Message 923514 - Posted: 4 Aug 2009, 2:59:56 UTC - in response to Message 923509.

Not sure if it effects windows, but the Linux version of 6.6.36 (anything after 6.6.11 actually) puts two WU on one GPU, no fix yet (outside compiling your own client)

Profile Ageless
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Message 923525 - Posted: 4 Aug 2009, 6:04:48 UTC - in response to Message 923509.

You did restart BOINC completely?
How is BOINC installed on your system? Hopefully not as a service (protected application execution mode)?
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Jord

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NuclearRage
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Message 923635 - Posted: 4 Aug 2009, 23:31:59 UTC - in response to Message 923525.

ok , uninstalled boinc
then deleted any trace of boinc
then reinstallled 6.6.36
no joy
loaded ccinfo file with out typo (hehe just a little fun , thanks for the script)

still no joy

read a few hundred posts more , found one where a guy got 2 working when he plugged a 2nd monitor into the second card ... strange earlier nvidia drivers didn't like my 2nd monitor in the second card .. so i try it , it works , trying switching to sli in nvidia control panel , 2nd monitor still works , switch off sli and load boinc and walla both cards now detected.

i know not to use sli with boinc , only runs on one card then


BUT **** the latest round of drivers from nvidia have to be the cause , and before -running 2 monitors with sli enable you had to plug them into one card , now you can plug into both cards and switch in and out of sli without any problems *** hope this helps others out .....

now i am dying to get a 3rd monitor , wanted 3 to begin with , but was afraid of having to buy a 295 for sli gaming and a 2nd existing card for 2nd and 3rd monitors , boinc might have saved me 500 smackers
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Gregory A Pharr
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Message 924849 - Posted: 9 Aug 2009, 5:34:56 UTC

With the latest nVidia drivers 190.38, a new version of CUDA 2.3 is included that now requires SLI to be enabled to see multiple CUDA devices, just the opposite of before. For us gamers, this is nice because now we don't have to keep turning it off and on to run BOINC, just leave it on all the time. I had to do the same on my machine to get multiple CUDA work units at once.
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Fred W
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Message 924877 - Posted: 9 Aug 2009, 8:49:15 UTC - in response to Message 924849.

With the latest nVidia drivers 190.38, a new version of CUDA 2.3 is included that now requires SLI to be enabled to see multiple CUDA devices, just the opposite of before. For us gamers, this is nice because now we don't have to keep turning it off and on to run BOINC, just leave it on all the time. I had to do the same on my machine to get multiple CUDA work units at once.

Hmmmm. Not strictly. I am still running with SLI disabled / PhysX enabled. Doesn't seem to matter which way SLI is set.

F.
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Gregory A Pharr
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Message 924899 - Posted: 9 Aug 2009, 12:54:03 UTC

Yeah, I've seen other posts in other forums this morning that indicate that the new drivers behave differently under different OS's, and even between 32bit and 64bit versions of the same OS. For example, I'm running 64bit Vista and on mine, I must enable SLI or BOINC only sees one CUDA device, but I've seen posts on from others such as you that see different behavior from the new drivers. Perhaps the version of BOINC makes a difference too in how it interacts with the new drivers. I'm running 6.6.38. What a pain, huh? Guess people just need to experiment and see what happens on their specific setup. Anyway, if people are only seeing one device and getting one WU at a time, at least they know now to try playing with the SLI setting as a possible fix. Only takes a few seconds to try...
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Fred W
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Message 924914 - Posted: 9 Aug 2009, 14:09:04 UTC - in response to Message 924899.

Yeah, I've seen other posts in other forums this morning that indicate that the new drivers behave differently under different OS's, and even between 32bit and 64bit versions of the same OS. For example, I'm running 64bit Vista and on mine, I must enable SLI or BOINC only sees one CUDA device, but I've seen posts on from others such as you that see different behavior from the new drivers. Perhaps the version of BOINC makes a difference too in how it interacts with the new drivers. I'm running 6.6.38. What a pain, huh? Guess people just need to experiment and see what happens on their specific setup. Anyway, if people are only seeing one device and getting one WU at a time, at least they know now to try playing with the SLI setting as a possible fix. Only takes a few seconds to try...

Curious. I'm running Vista x64 with 6.6.37.

F.
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Jason Keil
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Message 924978 - Posted: 9 Aug 2009, 19:03:11 UTC

I,m running vista 64 bit and 6.6.38 and I have SLI disable and Phys X enabled and both my EVGA 260 core 216 card are showing. Also using 190.38 NVIDIA drivers and CUDA 2.3 Dlls.
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Shannon Hill
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Message 926024 - Posted: 14 Aug 2009, 14:46:12 UTC

I installed the cuda+190.38 drivers from nvidia,
I've installed the cc_config.xml file; I get this
status from boinc, but still.. only 1 cuda jobs runs. Why?

8/14/2009 10:34:40 AM Local time is UTC -4 hours
8/14/2009 10:34:44 AM CUDA devices: GeForce 8400 GS (driver version 19038, CUDA version 1.1, 256MB, est. 5GFLOPS), GeForce 8400 GS (driver version 19038, CUDA version 1.1, 512MB, est. 4GFLOPS)
8/14/2009 10:34:44 AM Not using a proxy

Questions and Answers : GPU applications : only using 1 gpu since latest boinc update 6.6.36

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