9600 GT PRoblem


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Questions and Answers : GPU applications : 9600 GT PRoblem

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Profile razamatraz
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Message 909962 - Posted: 21 Jun 2009, 23:34:09 UTC
Last modified: 21 Jun 2009, 23:49:06 UTC

So I picked up a 9600 GT from ebay to use as a cruncher in my old Pentium D 945. It ran good for the first day or so averaging an hour per WU, but then it started having trouble, Cuda WUs started taking forever (probably CPU fallback) and the machine would become completely unresponsive. Of note is that I had switched to the new 186 driver, but I think that was before it ran good for a full day.

The Lunatics Optimized Cuda with VLAR kill was installed.


I have since pulled the card and put it back to the old 7600 GT that was in it. now running good on AKv8, but no CUDA of course.

http://setiathome.berkeley.edu/result.php?resultid=1270724511 is one that i thin kwas CPU fallback, can someone verify this, and maybe take a look at the other units?? I also aborted quite a few,


http://setiathome.berkeley.edu/show_host_detail.php?hostid=4551859 is teh computer. SETI has already updated and removed the GPU but it was a BFG 9600 GT OC2

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Message 909973 - Posted: 22 Jun 2009, 0:49:51 UTC - in response to Message 909962.

Running an EVGA 9600GT KO with no problems. WU's take between 24-28 minutes a piece. VLAR units took about 1.5 hours, before I installed the 'kill'. I am running a Pentium D 960. How hot did your card get?
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Profile Byron S Goodgame
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Message 909976 - Posted: 22 Jun 2009, 0:56:04 UTC - in response to Message 909962.
Last modified: 22 Jun 2009, 1:04:00 UTC

HI,

The task you mentioned does fallback in to cpu mode, but I also notice from the task
"setiathome_CUDA: device 1 is emulation device and should not be used, supports 9999.9999" as well as "Total GPU memory 0 free GPU memory 0"

How much memory does the card have? What if anything are you running that may be taking from the gpu memory? Aslo is the card OC'd?

Edit: Looking at other tasks I see "Total GPU memory 536543232 free GPU memory 497069568" so it seems you have enough memory during those tasks. Might have just been the memory got stuck in memory on one task and so it didn't have enough for the example you gave. You mgiht try going back to an earlier driver as well as looking into what you were running at the time that might have effected the memory on the card, such as screen saver, video, games etc..
.
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Profile razamatraz
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Message 910192 - Posted: 22 Jun 2009, 17:56:07 UTC

Card is not manually overclocked, but is an OC2 from BFG. It has 512 MB, but this is an XP 32 machine with 4 gigs of ram so may be limited by addressing????

I never managed to get a temp level when it crashed but it was reading only around 60C when it was running, I manually ran the fan at 70% with rivatuner.

This machine doesn't get used for anything but facebook and crunching, maybe the odd word document, and GPU use was set to turn off when the computer was in use.

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Message 910235 - Posted: 22 Jun 2009, 20:47:44 UTC - in response to Message 910192.

Card is not manually overclocked, but is an OC2 from BFG. It has 512 MB, but this is an XP 32 machine with 4 gigs of ram so may be limited by addressing????


There's a good chance that this may be the problem.

A 32bit processor can only address a total of 4GiB of space. Inside this 4GiB of space must fit all of your system's RAM, the video card's RAM, any onboard devices on your motherboard and any other add-in cards that use up a portion of addresses.

What usually happens is the system RAM is reduced by however much space is used by all other devices (so if all other devices, including video RAM, total 1.5GiB of space, then your system RAM will be reduced by 1.5GiB to make room in the address space), but other adverse affects can be attributed as well.
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Profile Byron S Goodgame
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Message 910298 - Posted: 23 Jun 2009, 0:49:27 UTC
Last modified: 23 Jun 2009, 0:57:09 UTC

Hi,

Also since you seem to be using 6.6.36 now, there is also a bug mentioned in this thread that has characteristics of the problem you had. Not sure when you made the switch from 6.6.28 to 6.6.36 so it may not have had any part in what you were seeing before, but may with future tasks.
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Questions and Answers : GPU applications : 9600 GT PRoblem

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