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Re: Core 18 and Maxwell
Posted: Sun Nov 23, 2014 11:53 am
by ChristianVirtual
Breach wrote:
Especially since nVidia is supposed to be "OpenCL conformant":
https://www.khronos.org/conformance/ado ... ies#opencl
Probably they already have appropriate contacts with nVidia with the people responsible for OpenCL compliance.
Good idea (in principal), just add Apple too in that mail. They are on the same page as NVIDIA. And also not working. Then I'm sure they are compliant enough to be compliant. Just not the way we need them to be compliant.
But yeah, never bad to raise the voice of customer.
Re: Core 18 and Maxwell
Posted: Fri Dec 19, 2014 2:02 am
by Kornflake
I've submitted the following bug report to
http://nvidia-submit.custhelp.com/ with reference number 141218-000430
The purpose of this submission is to gain awareness and move up on the priority list a bug related to the implementation of OpenCL in the new Maxwell cards. This bug is causing an approximate 75% performance decrease in the charity work the Folding at Home (F@H) community is trying to do to study chronic diseases. I recently bought 3 GTX980's primarily for F@H as part of an Alienware Dell Desktop and I am saddened to hear of my mistake in not knowing about this major bug beforehand.
The bug is described in this forum post:
https://forums.geforce.com/default/topi ... ver-bug/1/
NVIDIA claims support for OpenCL here:
https://developer.nvidia.com/opencl
The head scientist at F@H claimed you were "working on this bug" here:
viewtopic.php?f=16&t=26980&start=15#p271098
We don't have any location to officially express our demand for this bug fix. I've attached my msinfo in case you wish to review. Thank you for your help!
Re: Core 18 and Maxwell
Posted: Mon Dec 29, 2014 2:39 am
by knopflerbruce
Why not add some code that disables the troublesome projects for GTX970/980? Having a gazillion Maxwells running at half speed is bad for the project in general (=slower returns overall) - it would be way better if those GPUs ran other WUs at full speed. Let 680/780/780ti's run these core 18 units if they perform reasonably well.
...or adjust the point for core 18 until a fix is in place, so that it matches p9201.
Maybe this is nvidia's fault in the end, but it's not like YOU cannot do anything to improve the situation. Stop waiting for the darn driver and do something useful that makes a difference NOW! Change the points, or "ban" core 18 from Maxwell GPUs. I'm not a coder, but this must be a rather simple task (alot simpler than fixing the driver!).
Re: Core 18 and Maxwell
Posted: Tue Dec 30, 2014 3:44 am
by mdk777
What you describe has been debated since the problem was first recognized in March.
The decision was made to release the WU from beta despite not having a resolution of the known problem.
I could link you to a dozen threads, but your best bet(in theory) is to participate here:
https://www.reddit.com/r/foldingathome/ ... l_support/
Re: Core 18 and Maxwell
Posted: Tue Dec 30, 2014 3:33 pm
by Kjetil
Yes and do they fix it, no?
Re: Core 18 and Maxwell
Posted: Tue Dec 30, 2014 4:07 pm
by bruce
Kjetil wrote:Yes and do they fix it, no?
They have identified (isolated) the main problem. That's only the first step in fixing it, but it's probably the most important step.
Re: Core 18 and Maxwell
Posted: Fri May 08, 2015 4:22 pm
by Classicman34
Hello everyone,
It has been more than 4 months since the issue has been isolated. Has the fix been provided or is it already integrated into the core 18?
Regards.
Re: Core 18 and Maxwell
Posted: Fri May 08, 2015 4:56 pm
by VijayPande
With some very recent fixes on the NV side, we’ve been testing a new core.
Re: Core 18 and Maxwell
Posted: Fri May 08, 2015 4:56 pm
by mpharrigan
The fix is in beta and will be rolling out ~ next week
Re: Core 18 and Maxwell
Posted: Fri May 08, 2015 5:28 pm
by bruce
Will this require us to update drivers?
Re: Core 18 and Maxwell
Posted: Fri May 08, 2015 5:39 pm
by coredump4
This is good news! Will clients with the "beta" flag have a chance to test the core?
Re: Core 18 and Maxwell
Posted: Fri May 08, 2015 11:51 pm
by Nert
Any driver requirements should be noted somewhere.
I see that Core 18 is going to general users as outlined in this thread (I hope I did this link right):
viewtopic.php?f=66&t=27417&start=30.
I mostly just want to know what driver version I should have on my 750 TIs to be able to provide maximum benefit.
Re: Core 18 and Maxwell
Posted: Sat May 09, 2015 3:06 pm
by 7im
From info from having read other people's reports: The latest v.4 of the core_18 seems to run okay on all driver versions, but runs best on Maxwell cards with Win drivers 347.xx and above, and Lin drivers 346.xx and above (which support CUDA SDK 7).
Re: Core 18 and Maxwell
Posted: Sat May 09, 2015 3:14 pm
by jimerickson
thank you 7im!
Re: Core 18 and Maxwell
Posted: Sat May 09, 2015 11:10 pm
by Nert
Looks like I'm good to go [version 347.52] I'm looking forward to seeing some x'18 cores come down the line.
Thanks 7im.