Hi !
After 2 weeks vacation, I came back and noticed that I received mixed 3.1 and 4.2 WUs on both my machines.

The one under Linux is working fine with much more credits than before.
The one under Win 7 is working but with less credits than before.

On this machine (Win 7) I have a 8 cores CPU(fx 8150) and each GPU uses 0.561 of CPU with a max nr of CPU set to 75%, leaving 2 CPUs for GPUGRID.
World community grid is using only 5 of the 6 remaining cores so 1 CPU seems not be used .
When GPUGRID is running , my display refresh is VERY slow as if the system was slowed down.
I noticed this already sometimes before CUDA 4.2 was used. When suspending GPUs for a while and then reenabling everything was running again file for a while.
But now this is systematically happening : everything is allright when GPUs are not crunching, but slowed down when crunching.
Does someone have the same kind if problem ?

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Lubuntu 16.04.1 LTS x64

OK !!!
Found that SLI was enabled.
I disabled SLI and everything runs fine again.
Just a warning : if you want also to disable SLI, suspend your crunching or even better wait for all WUs termination (not allowing new work).
I did not do that and got a BSOD !
After reboot the WUs were not in error and continued normally.

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Lubuntu 16.04.1 LTS x64

OK !!!
Found that SLI was enabled.
I disabled SLI and everything runs fine again.

How/where do you disable SLI??

Thanks, Tom

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OK !!!
Found that SLI was enabled.
I disabled SLI and everything runs fine again.

How/where do you disable SLI??

Thanks, Tom

Hi Tom !
Go the Nvidia configuration panel.
Go to 3D parameters
here Go to Configure multiple Graphical Processors, Surround and Physx (Note that this a translation from french to english: my panel is in french ;-) )
Then on the right panel, select Disable (or deactivate) multiple graphical processor mode

As a result there must be , at the bottom of the panel, a sentence saying that all graphical processors are operating independently.

Hope this helps...

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Lubuntu 16.04.1 LTS x64

OK !!!
Found that SLI was enabled.
I disabled SLI and everything runs fine again.

How/where do you disable SLI??

Thanks, Tom

Hi Tom !
Go the Nvidia configuration panel.
Go to 3D parameters
here Go to Configure multiple Graphical Processors, Surround and Physx (Note that this a translation from french to english: my panel is in french ;-) )
Then on the right panel, select Disable (or deactivate) multiple graphical processor mode

As a result there must be , at the bottom of the panel, a sentence saying that all graphical processors are operating independently.

Hope this helps...

Many thanks for responding.

I have Nvidia Control Panel 4.4.370.0. There I clicked "Manage 3D Settings", which gave me two tabs: "Global Settings" and "Program Settings". Here ya go:



I see no reference to SLI there...

I'm really getting desperate over video performance while GPUGRID is running. Most of the day I have to suspend BOINC.

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Hi Tom !
How many GPU(s) do you have and are your GPU(s) brand and model ?
What is the driver version ?
Does you MOBO has an integrated graphic chip ?

My NVidia Configuration Panel is 4.4.730.0

I suggest you intall latest (at least 301.42, these run fine) driver.
and latest Configuration Panel if not updated by the driver bundle.

The line I am talking about on the left side of the configuration panel is just after the one you choosed i.e "Manage 3D Settings".
I have the same as you have for what you are showing in "Manage 3D Settings".

If you don't have this than you need updating or you don(t have an SLI capable configuration.

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Lubuntu 16.04.1 LTS x64

Thanks for the fast response, jlhal.

I have a single ASUS GTX 460, OCed to 850/1700/2000. No graphic chip on the MOBO.

I went to nvidia.com looking for a dreiver update. Here's what he said:



Looks like I'm up-to-date.

Here's what I find below "Manage 3D Settings":



So I guess SLI does not apply to me and I must look elsewhere for an answer to my performance problem...

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You're right, SLI does not apply to you.
I used to run GPUGRID on 2 GTX460 one was a 460SO the other a 460OC . Both OCed from factory and everything was OK (no SLI configured thow)
If your card is not a factory OCed one , I suggest you come back to factory settings and see what is happening...
If this is not the case...I'm wondering...
On normal use the card behaves well, but if you are playing graphical power demanding games, you should invalidate computing while your app is active (cc_config.xml).

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Lubuntu 16.04.1 LTS x64

If your card is not a factory OCed one , I suggest you come back to factory settings and see what is happening...

Thanks. OK. Did that. We shall see...

But... is there not a setting that will let me select how much - how little - GPU power is devoted to BOINC??

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But... is there not a setting that will let me select how much - how little - GPU power is devoted to BOINC??

To my knowledge there is actually no paremeter to limit GPU usage in terms of power percentage.
Only the CPU power usage may be limited.

Keep us in touch ...

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Lubuntu 16.04.1 LTS x64

I've been suffering this problem for months (ASUS GTX 460 OCed, Win 7, 8 CPUs)and it's getting so bad now that I've been reluctantly forced to stop GPUGRID processing. I do hope someone will, sometime, come up with a solution and post here.

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I've been suffering this problem for months (ASUS GTX 460 OCed, Win 7, 8 CPUs)and it's getting so bad now that I've been reluctantly forced to stop GPUGRID processing. I do hope someone will, sometime, come up with a solution and post here.

Are you crunching for other projects and do you have the same problem with them ?

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Lubuntu 16.04.1 LTS x64

I've been suffering this problem for months (ASUS GTX 460 OCed, Win 7, 8 CPUs)and it's getting so bad now that I've been reluctantly forced to stop GPUGRID processing. I do hope someone will, sometime, come up with a solution and post here.

Are you crunching for other projects and do you have the same problem with them ?

No. I am (was...) a 100% dedicated GPUGRID-er.

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I may, just..., have fixed the problem!

I thought I'd try not running "long runs". Found a parameter in BOINC / Tools / Computing Preferences / processor usage "Use GPU while computer is in use". It was checked. I unchecked it.

I'm now doing "long runs" and will report here what happens...

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I am having a similar problem. I have to pause gpugrid when using my PC, but only on the NATAN wus. Other work units can run when I use my PC without any problems.

I may, just..., have fixed the problem!

I thought I'd try not running "long runs". Found a parameter in BOINC / Tools / Computing Preferences / processor usage "Use GPU while computer is in use". It was checked. I unchecked it.

I'm now doing "long runs" and will report here what happens...

It made no difference to the poor performance. I've been giving my spare cycles to projects since May 1999, for the last three years to GPUGRID, so it is with great reluctance that I have decided to call it a day.

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If you select to not use the GPU when the system is in use, and the display performance is still poor, then the problem has nothing to do with running GPUGrid tasks, as these are not running when you are using the system.

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tomba :
It made no difference to the poor performance. I've been giving my spare cycles to projects since May 1999, for the last three years to GPUGRID, so it is with great reluctance that I have decided to call it a day.

skgiven :
If you select to not use the GPU when the system is in use, and the display performance is still poor, then the problem has nothing to do with running GPUGrid tasks, as these are not running when you are using the system.

Hi tomba, I agree with skgiven,

I did not notice trhat you are connected through HDMI, this is what is shown in your control panel), to a SAMSUNG S22B350 Full HD 22" LED Monitor with VGA and HDMI capabilities.

Can you try connect it through VGA instead , using a DVI to VGA adaptor (normally delivered with the card) and see what happens ?
I don't really know how it works with hdmi on the card side but who knows ?

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Lubuntu 16.04.1 LTS x64

In order for to work around the screen display lag issue....

I have made it a habit to suspend GPU tasks of certain applications, that are known to always generate lag, whenever I sit down at the computer, and then resume them before I leave. I also suspend other GPU tasks if I notice they are causing lag.

Right now, when I sit down at the computer, I always suspend World Community Grid Help Conquer Cancer tasks (since they always cause display lag for me), and I sometimes will suspend a GPUGrid.net task (if its a task that generates display lag that I notice after sitting down to my computer).

That way, while I'm working, my GPU can still crunch the tasks that don't generate lag (like Poem@Home tasks, or most GPUGrid.net tasks), and then when I leave, since I've resumed the other tasks before I leave, the scheduler will eventually complete them too.

That's the only workaround I have. I don't like it, but I cannot otherwise control the lag in some of these GPUGrid.net tasks.

GPUGrid.net Techs:
Should I be keeping track of which GPUGrid.net task types are generating display lag, and reporting them somewhere?

If you select to not use the GPU when the system is in use, and the display performance is still poor, then the problem has nothing to do with running GPUGrid tasks, as these are not running when you are using the system.

Sorry, but that's not right, for me. Here are my Tools / Computing Preferences settings:



If I open BOINC in a small window and start Chrome in another (opens 15 tabs in about 15 seconds), BOINC's progress % never waivers. It just keeps on going.

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