Errors on Geforce GTX 770

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Onsokumaru

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Message 671 - Posted: 29 Nov 2017, 18:32:13 UTC

Hello,

I'm crunching via grcpool and I'm wondering why I get errors with my Geforce GTX 770. These are my failing tasks:

https://sech.me/boinc/Amicable//results.php?hostid=10771&offset=0&show_names=0&state=6&appid=#

It seems that every WU crashes with the same error on different code lines:

OpenCL.cpp, line 469: clEnqueueWriteBuffer returned error -4

Is there something I can do for avoiding this problem? In one of the other Get Started Threads I read that a graphics card needs to have 2GB memory which this card has, but it explains why I can't use my Geforce GTX 650 Ti BOOST (some of the older failed WUs are caused by this card, the newest failed WUs are form the GTX 770).

Greetings Onsokumaru
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Sergei Chernykh
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Message 672 - Posted: 29 Nov 2017, 19:01:01 UTC - in response to Message 671.  

Try to reboot and run BOINC only, don't start any programs that use GPU (including web-browser). If errors go away, it means there is still not enough GPU memory to run both Amicable and other software at the same time.
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Sergei Chernykh
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Message 673 - Posted: 29 Nov 2017, 19:05:34 UTC

I would say to try reducing kernel size here: https://sech.me/boinc/Amicable/prefs.php?subset=project
But you'll need to use a separate user account for it.
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Onsokumaru

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Message 674 - Posted: 29 Nov 2017, 19:10:57 UTC - in response to Message 673.  

Ok, I'll try that. Another thing that just now popped in to my mind is... than it needs 2GB memory and the card has only 2GB so it's stupid to try to run 2 WUs parallel on that card, right? Maybe that's just the problem... I'll check this points. Thank you! :)
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Sergei Chernykh
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Message 675 - Posted: 29 Nov 2017, 19:55:04 UTC - in response to Message 674.  

it needs 2GB memory and the card has only 2GB so it's stupid to try to run 2 WUs parallel on that card, right?

Yes, each WU requires 2 GB of memory, so you need 4 GB to run 2 WUs in parallel.
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