I found the solution. I did not know that, after unchecking "Use GPU while computer is in use" in BOINC / Tools / Computing Preferences / Processor Usage, I had to activate this preference in BOINC / Activity by checking "Use GPU based on preferences".

Now when I wiggle the mouse in BOINC / Tasks, the GPUGRID WU immediately gives "Waiting to run". Perfect!

Certainly not perfect! I ran as above for five days. Every day I had two or three PC lock-outs - it was dead - it was big-red-switch time.

So I'm now running as before, and aborting NATHANs that kill my PC performance.

Hello Nathan - are you listening??

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I have had the same problem (NATHAN units only). They can not run on GTX460 while you're using computer without making computer nearly useless.

I would like to say all other units run fine!

If I may add my 2 cents. I'm currently running 4 GTX460 (768MB) GPUs here. All WUs run perfectly except for NATHAN. The NATHAN WUs run at half speed on all 4 of the above cards. It should be rather easy to up a different queue for the NATHAN WUs by using a unique exe name and allowing us to choose whether to run them via a check box in our project preferences.

The long runs NATHAN make my PC graphics laggy. The short runs don't AT ALL (you can't even tell you are running GPUGRID with the short runs), but given the 150% bonus for sending a long run back, I'm sucking it up (I get around 1.5 credits/second with the long runs versus ~0.7 credits/second with the short runs).

I just got a "TONI" long run, and OMG what a difference does it make. The graphics on my computer are lag-less. You can't even tell I'm running GPUGRID.

Edit: I just realized it's only using 92% of the GPU vs the 98% the NATHANS use. Still... the difference is amazing (in favor of the TONI).

Go TONI

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FAQ's

HOW TO:
- Opt out of Beta Tests
- Ask for Help

Go TONI

+1

I just got a "TONI" long run, and OMG what a difference does it make. The graphics on my computer are lag-less. You can't even tell I'm running GPUGRID.

I'm so glad that it's not just me!! I've just processed a TONI too and all is sweetness and light!

Pretty please, Nathan, take action, ANY action, to stop your WUs killing our PC's performance!! We are dedicated to your cause. Please dedicate yourself to ours!! Thank you.

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Pretty please, Nathan, take action, ANY action, to stop your WUs killing our PC's performance!! We are dedicated to your cause. Please dedicate yourself to ours!! Thank you.

And please fix them so they won't run at 1/2 speed on some GPUs. Thanks also.

I have had the same problem (NATHAN units only). They can not run on GTX460 while you're using computer without making computer nearly useless.

I would like to say all other units run fine!

If I may add my 2 cents. I'm currently running 4 GTX460 (768MB) GPUs here. All WUs run perfectly except for NATHAN. The NATHAN WUs run at half speed on all 4 of the above cards. It should be rather easy to up a different queue for the NATHAN WUs by using a unique exe name and allowing us to choose whether to run them via a check box in our project preferences.

I was running a GTX460(768MB) and GTX550Ti in my main cruncher and the GTX550 got through Nathans much faster. When I decided to upgrade the 460 was the first to go.

Now running dual GTX670's.

I vote for NOT decreasing the speed of the NATHAN units. IMO they should be coded to run as fast as possible and it seems NATHAN has figured out how to do that. The display lag seems to be an issue with the OS/driver interactions. If it makes your system unusable I would suggest running the standard work units (short) or unchecking "Use GPU while computer is in use."

This is my opinion and I understand that it is not the majority.

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XtremeSystems.org - #1 Team in GPUGrid

I vote for NOT decreasing the speed of the NATHAN units.

I don't think it has anything to do with the "speed" of the WUs. It seems that the way they're coded they run OK on some cards and not on others. Nathan might want to talk to Toni :-)

I agree with werdwerdus and sorry if I repeat myself once again...

I have been crunching Nathans WUs with 2 GTX460 (1GB GDDR each if I remember well) on 2 different systems (Win and Ubuntu) and then on one system with both cards together : I never had this problem with Nathan's WUs.

The only problem was later with a GTX590 with SLI enabled (See my 1st post in that was the starting point of this thread).

This has NOTHING to do with Nathan WUs .

Sorry but if you get problems , I' m pretty sure this is a problem with YOUR system.

upgrade or change your GPU or upgrade rour system ! !

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Lubuntu 16.04.1 LTS x64

I have been crunching Nathans WUs with 2 GTX460 (1GB GDDR each if I remember well) on 2 different systems (Win and Ubuntu) and then on one system with both cards together : I never had this problem with Nathan's WUs.

Sorry but if you get problems , I' m pretty sure this is a problem with YOUR system.

upgrade or change your GPU or upgrade rour system ! !

Things have changed. The last time you connected with your 2 GTX 460 boxes was March/2011 and Feb/2012:

http://www.gpugrid.net/hosts_user.php?sort=rpc_time&rev=0&show_all=1&userid=57540

Now you're running a GTX 690 & a GTX 590. Your GTX 590 shows 28 "errors while computing", 27 of which are NATHAN WUs, and your current GPUs are among the ones that actually work better with these WUs. Upgrade our GPUs? They work very well with the other WUs. How about upgrade the programming...

Sorry but if you get problems , I' m pretty sure this is a problem with YOUR system.

upgrade or change your GPU or upgrade rour system ! !

It's not a problem with my system and while you're no doubt sitting on piles of cash to upgrade everything so you can have your million plus RAC not everyone can or wants to spend their hard earned cash in these hard times.

Are you a Banker?

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Things have changed. The last time you connected with your 2 GTX 460 boxes was March/2011 and Feb/2012:

http://www.gpugrid.net/hosts_user.php?sort=rpc_time&rev=0&show_all=1&userid=57540

Now you're running a GTX 690 & a GTX 590. Your GTX 590 shows 28 "errors while computing", 27 of which are NATHAN WUs, and your current GPUs are among the ones that actually work better with these WUs. Upgrade our GPUs? They work very well with the other WUs. How about upgrade the programming...

The errors you are mentioning are real WUs errors , they did not even start !

It's not a problem with my system and while you're no doubt sitting on piles of cash to upgrade everything so you can have your million plus RAC not everyone can or wants to spend their hard earned cash in these hard times.

Are you a Banker?

How can you explain that, for the involved WUs, not everybody with this kind of GPU is affected. If a WU is badly programmed it will affect a lot of different kinds of GPU.

No sir, I'm not a banker ,lol , but some put their money in a house, other in a car etc... It' s just a matter of choice...
Upgrading to a High-end card is not a must and there are still a lot of gtx 5xx series cards above the GTX460 available as second hand.
Regards.

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Lubuntu 16.04.1 LTS x64

How can you explain that, for the involved WUs, not everybody with this kind of GPU is affected.

Everyone with the GTX 460 786MB is affected with the 1/2 speed NATHAN bug. I've looked at the results from dozens of them. They're one of the more common GPUs being run and the NATHAN WU performance is severely degraded on all of them. Bad for the project, bad for the users

some put their money in a house, other in a car etc... It' s just a matter of choice...

So we're supposed to buy video cards instead of a house or car? I think your priorities are a bit out of whack. All that needs to be done is fix some WUs or set up a separate queue, either of which should be simple.

Everyone with the GTX 460 786MB is affected with the 1/2 speed NATHAN bug. I've looked at the results from dozens of them. They're one of the more common GPUs being run and the NATHAN WU performance is severely degraded on all of them. Bad for the project, bad for the users

Only all GTX460 with 768MB ?
What about those with 1GB ? Is somebody with 1GB GTX460 also affected ?
I don't think Nathan wants to consider reprogramming (if this is possible...) to fix the GTX460 with 768MB but if he does this is allright, but only if this is not a penalty for all others.
Nathan it's up to you , if you ever read this thread... (I hope so)

So we're supposed to buy video cards instead of a house or car? I think your priorities are a bit out of whack.

I did not say I'm living on the street and that I don't have a car. But I'm sure you have very well understood what I have been talking about..
Regards

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Lubuntu 16.04.1 LTS x64

Is somebody with 1GB GTX460 also affected ?

Oh.. YES!! I've been following this thread for MONTHS!! Since mid October, when I started recording all WUs, I've had 40 "GOOD" Nathans and 72 "BAD ONES".

If only Nathan would join us here and not sulk in the background... He MUST know about this thread!!!

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So we're supposed to buy video cards instead of a house or car? I think your priorities are a bit out of whack.

I did not say I'm living on the street and that I don't have a car. But I'm sure you have very well understood what I have been talking about..
Regards

I personally have ALMOST a 2 MILLION RAC at another project, AND live in a home and own an 8 year old car AND a 1 year old car, actually BOTH are suv's. I also have 15 pc's, all but 2 with gpu's crunching, running here at home and have a $500.00+ a month electric bill! My electric bill is over twice what my neighbor pays, he has a similar family and house size. It is called disposable income, some of us have it and some don't! IMHO I am not sure it matters though, we ALL crunch and THAT is what is important, not HOW MUCH we crunch.

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Regarding NATHAN WUs:
I believe the issue some of you are having is caused by high memory usage of Nathan WUs running on cards with less RAM. This is a hypothesis, but I have noticed the following:

* TONI WUs (long) e.g. WU 3928763 causes 92% GPU load, and approx 500 MB GPU memory use.
* NATHAN WUs (long) e.g. WU 6183375 causes 96-98% GPU load, and approx 1100 MB GPU memory use.

I am having no trouble at all running NATHAN WUs, but all of my cards have +2GB of memory. I can imagine that if your card has less than arround 1100 MB of RAM, you would face some problems like the ones you have with your 768MB GTX460. When I read the Recommended GPU FAQ I notice that the GTX460 is only recommended for use with short tasks, and that all GPU in the category "highly recommended" has 1GB of RAM or more.

Have you tried using GPU-Z utility to monitor the load and memory usage on your GPU?