GPU problems with NVIDIA GTX 660


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Questions and Answers : GPU applications : GPU problems with NVIDIA GTX 660

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Message 1324715 - Posted: 4 Jan 2013, 21:46:47 UTC - in response to Message 1324698.

From the sticky thread NVidia driver problems which cause computation errors:

2) Kepler cards unsupported

Drivers affected: All drivers from 304.48 (BETA) onwards.
Hardware affected: nVidia 'Kepler' - GT 6xx and GTX 6xx cards.

Symptom: All tasks end in errors when using the stock v6.10 'cuda_fermi' application.

Solution/workround:
a) Use an optimised Cuda application, where available.
b) Downgrade to the 301.42 driver - only possible on GTX 670/680/690 cards, not on newer releases like the 650/660 or their Ti variants.
c) Set an environment variable, as shown below.

The environment variable to use is

CUDA_GRID_SIZE_COMPAT

and it needs to have the value 1 (one)

You need to be running in Administrator mode, and you need to be running at least driver 306.02 (BETA) or 306.23 (WHQL)

Here's how to reach the setting screen:

Windows 7/Vista:



Windows XP:



The options given are Either, or, or. In other words, choose one and try it, there's no need to use all three.

Optimized applications, if you don't have one yet on another machine, aren't available at this time due to copyright problems with one of the compilers.
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Message 1324736 - Posted: 4 Jan 2013, 23:55:15 UTC - in response to Message 1324698.

I should have added that the OS is Windows 8 on an HP Desktop.
The Display Adaptor Driver version is 9.18.13.529. I was unable to find the Environment Variable. Tried searching Control Panel, No match found.

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Message 1324742 - Posted: 5 Jan 2013, 0:28:21 UTC - in response to Message 1324736.

http://www.technoon.com/how-to-add-environment-variables-in-windows-8.html
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Message 1337263 - Posted: 12 Feb 2013, 0:24:49 UTC

I have a 660 Ti. So downgrading is not an option.

Hope this problem will get fixed in the future.

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Message 1337425 - Posted: 12 Feb 2013, 12:11:27 UTC - in response to Message 1337263.


Read!: "The options given are Either, or, or. In other words, choose one and try it, there's no need to use all three."

You need only:
CUDA_GRID_SIZE_COMPAT


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- ALF - "Find out what you don't do well ..... then don't do it!" :)

Questions and Answers : GPU applications : GPU problems with NVIDIA GTX 660

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