For some reason, I can't get the second card to be recognized by GPUGrid. I still have (0.21 CPUs, 1 CUDA) running on GPUGrid. Plus after installing the second card, there were several computation errors. I uninstalled the graphics drivers, went into safe mode and reinstalled the drivers, but still only one CUDA device is running. I am using two EVGA 896-P3-1255-AR devices. And yes, I put the "cable" on the SLi portion of the cards (there were two places to put the "cable" but I used the slot by the back edge. (Hope I did that correctly.)

what version of the nvid drivers are you using, as 190.38+ had it set where computing will occur on both gpu's, any driver before that you have manually disable sli.

plus their is a setting in the cc_config file of boinc for use all gpus.

add this line to the cc_config file in boinc:

<use_all_gpus>1</use_all_gpus>

cc_config file configuration:

http://boinc.berkeley.edu/wiki/Client_configuration

Using 190.62

cc_config file created.

Used Advanced/read config file

still only one card running

<cc_config>
<log_flags>
<use_all_gpus>1</use_all_gpus>
</log_flags>
</cc_config>

it needs to be in this form:

<cc_config>
<options>
<use_all_gpus>1</use_all_gpus>
</options>
</cc_config>

Edited appropriately.

By the way, thanks for the quick response, zpm.

What is GPU-Z showing & device manager ? Also two GPU's ? If "yes', try to move one card to another PCI-E slot, in case that it availiable on MB. Did you also use ZyDOR's recommendations for drivers uninstall prcedure?
Yours,

Jet

Jet, i don't know if you read everything or not, but his problem is fixed.!

Have you checked in NVIDIA control panel that SLI is enabled ?

OMG. I say anymore than that OMG, I'm going to Kill someone!....................

ROFL :)

Think Zen :)

w/e. I'm glad that his cards are performing, i'm sure that if he was still having the problem, a thank you wouldn't of been the response.

Hi,

has anyone a summary about the GTX260 troubles?
I can remember a posting, that says, end of august maybe a solution available. Yesterday i tried it, but my wu's still fail.

I use latest versions of Boinc (6.10.0), nvidia driver and vista 64. Currently i run einstein and seti cuda wu's, they work fine, but I'm looking forward to enable gpugrid again.

Regards

Alexander