GeForce 9500 GT: Too small for CUDA SETI@Home?


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Questions and Answers : GPU applications : GeForce 9500 GT: Too small for CUDA SETI@Home?

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Profile Grand Admiral Thrawn
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Message 1022654 - Posted: 5 Aug 2010, 9:34:08 UTC
Last modified: 5 Aug 2010, 9:37:01 UTC

Greetings!

I have built a new machine which should be dedicated to SETI@Home. It is equipped with a small Dual Core Pentium as well as a GeForce GTX 285 and a GeForce 9500GT.

Now, BOINC says, that the 9500GT is "not used".. but why? Too small?

Driver for both cards is 298.96, CUDA is enabled for all GPUs in nVidia CPL. CUDA version is 3.01, compute capability for 285 GTX is 1.3, for 9500GT is 1.1.

The 9500GT has 32x G96 CUDA cores and 512MB of VRAM. Is this not enough cores for SETI@Home?

Thanks!

Edit: Both cards are on the CUDA supported GPUs list at nVidia.com, OS is WinXP x64 Edition.
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Profile Gundolf Jahn
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Message 1022658 - Posted: 5 Aug 2010, 10:17:20 UTC - in response to Message 1022654.
Last modified: 5 Aug 2010, 10:19:43 UTC

BOINC uses by default only the stronger GPU if there are different types.

To override this default, you'll have to create a cc_config.xml file in your BOINC data directory (if you didn't do so already).

If you don't have a cc_config.xml, create one using notepad (Editor) and paste

<cc_config> <options> <use_all_gpus>1</use_all_gpus> </options> </cc_config>
into it. When saving (in ANSI format), make sure that no other suffix (.txt) is appended to the filename.

If you already have created a cc_config.xml file, add the <use_all_gpus> line to the <options> section.

After that, select "Read config file" from the Advanced menu or, better yet, restart BOINC.

See also the Nvidia CUDA & ATI Stream (CAL) FAQ at the BOINC FAQ Service.

Gruß,
Gundolf
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Profile Grand Admiral Thrawn
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Message 1022674 - Posted: 5 Aug 2010, 11:45:07 UTC - in response to Message 1022658.
Last modified: 5 Aug 2010, 11:45:29 UTC

Aaah, it says now: "Config: use all coprocessors". Very nice, thank you! btw., BOINC even reads the file fine in UTF-8 encoding.. Seems to be no problem (I created it on Linux, then copied it over).

I only installed BOINC on Multi-GPU systems with identical GPUs before (like 2 x GTX 285 or 2 x GTX 480), on such systems it uses both GPUs by default, so I didn't expect such behaviour. :)
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Profile Gundolf Jahn
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Message 1022694 - Posted: 5 Aug 2010, 13:45:12 UTC - in response to Message 1022674.

btw., BOINC even reads the file fine in UTF-8 encoding.. Seems to be no problem (I created it on Linux, then copied it over).

That seems to make the difference. If you had saved it from Notepad with UTF-8 encoding, it would have created two extra bytes at the start of the file, which are invisible (transparent:-) to other windows programs but cause a syntax error with BOINC.

Gruß,
Gundolf

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Message 1023016 - Posted: 6 Aug 2010, 12:36:46 UTC - in response to Message 1022694.

Oh, ok, didn't know that about Notepad. Will keep that in mind though.
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Questions and Answers : GPU applications : GeForce 9500 GT: Too small for CUDA SETI@Home?

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