GPU not running at 100%

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Profile Mike
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Message 1224316 - Posted: 28 Apr 2012, 10:14:23 UTC
Last modified: 28 Apr 2012, 10:15:00 UTC

You can remove the -sbs switch for APs on your ATI.
I think you already did.
It has slightly affect in actual AP apps.

For your 590.
You are still running x32f.
I would suggest running Lunatics 0,40 installer on that host to install actual apps.
It will install x41g.
You can easily run 3 WUs a time to increase GPU load.


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Message 1224932 - Posted: 29 Apr 2012, 16:26:20 UTC - in response to Message 1224316.

Ok, installed x41g and changed the app_info to <count>.33</count>

It will only run 2 WU's at a time, it tries to start a third but says 'waiting for GPU memory'

The GTX 590 is a 3GB card... don't think this should be happening?


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Message 1224939 - Posted: 29 Apr 2012, 16:38:16 UTC

Count 0.33 works on a 1 GB 450 like a charm.


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Message 1225035 - Posted: 29 Apr 2012, 19:46:00 UTC - in response to Message 1224932.
Last modified: 29 Apr 2012, 19:47:02 UTC

Ok, installed x41g and changed the app_info to <count>.33</count>

It will only run 2 WU's at a time, it tries to start a third but says 'waiting for GPU memory'

The GTX 590 is a 3GB card... don't think this should be happening?


I have a 590 too, 2 works @ 96-99% and 3 just makes the screen lag like crazy as almost all 1536MB on each half of the card is being used, so 2 there is better and I'm running Lunatics too. I'm running Win7 x64 sp1.
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Message 1225251 - Posted: 30 Apr 2012, 7:47:54 UTC - in response to Message 1224932.

Ok, installed x41g and changed the app_info to <count>.33</count>

It will only run 2 WU's at a time, it tries to start a third but says 'waiting for GPU memory'

The GTX 590 is a 3GB card... don't think this should be happening?


Un-SLI the card.

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Profile David Steel
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Message 1225276 - Posted: 30 Apr 2012, 10:23:26 UTC - in response to Message 1224939.

Count 0.33 works on a 1 GB 450 like a charm.


Well I opened my case and said to the 590 'why can't you crunch 3 at a time like your smaller 450 brother?' ....nothing changed.

VW, I tried the count at 0.50 or 2 WU's per GPU and all is good, GPU usage sits at 96 - 99%, the same as yours.

So its now crunching 4 at once and the run times are 12.5 to 13 minutes or about 750 seconds. Are you getting these times?

hbomber, how do you Un-SLI the card?

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Message 1225286 - Posted: 30 Apr 2012, 11:43:19 UTC
Last modified: 30 Apr 2012, 11:47:45 UTC

I mean to run it in no-SLI mode. I forgot now it looks like in NV Control Panel, but its pretty obvious there which mode to choose.
When in SLI, data in each GPUs memory is duplicated in local memory of other GPU too, so, while running 4 instances, 2 per GPU, those 3072 MB memory, 1536 for each GPU, actually contain 8 instances of WUs data, 4 for each local 1536 MB, mirrored on each card. It seems 1536 MB should be enough even for 4 intances, but anyway, there could be something else using videomemory also, so it won't hurt trying it.
And you can always monitor how much memory is being used with GPU-Z or Afterburner.


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Message 1225616 - Posted: 1 May 2012, 5:19:06 UTC - in response to Message 1225276.

Count 0.33 works on a 1 GB 450 like a charm.


Well I opened my case and said to the 590 'why can't you crunch 3 at a time like your smaller 450 brother?' ....nothing changed.

VW, I tried the count at 0.50 or 2 WU's per GPU and all is good, GPU usage sits at 96 - 99%, the same as yours.

So its now crunching 4 at once and the run times are 12.5 to 13 minutes or about 750 seconds. Are you getting these times?

hbomber, how do you Un-SLI the card?

Yep pretty much, the 301.24 driver and MSI Afterburner set to Force constant voltage with the fan at 95% of course, oh and no sli works here too.
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Message 1225675 - Posted: 1 May 2012, 9:13:07 UTC

Hi All.

I am having a weird problem that just started today, GPU chugs along merrily for a while and then goes to 0 load and the workunits take forever, anyone had a similar thing happen? exit and restart Boink manager and the same thing happens after an hour or so, any advice greatly appreciated,

Spectrum


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Message boards : Number crunching : GPU not running at 100%


 
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