2nd GPU stuck at idle clock speeds??

Hi guys,

I recently popped a second GPU (GTX260) in one of my crunchers and have noticed that this second GPU...while crunching...will remain at stock clock speeds and thus is rather slow.

For example, the 1st GTX260 is running at 650mhz core, the 2nd is running at only 400Mhz and is almost twice as slow.

I've tried with SLI enabled, SLI disabled, overclocking etc... and can't seem to get the #2 card to throttle up.

I'm running BOINC 6.10.18 with the latest Lunatics Unified Installer and the Nvidia 258.96 drivers (W7 64).

Any suggestions?

Thanks in advance.

do you have a dummy plug installed? cc_config?
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I don't have a dummy plug on the second GPU, I thought that only helped when the second GPU wasn't being seen by BOINC?? I have some extras though so I can give that a shot. No custom cc_config.

I just rebooted and now both cards are running at full speed again.
Seems like the 2nd card randomly will downclock to idle speeds (still under full load and crunching). I'll keep an eye on it now that I'm aware of the issue and see when it drops off.

1) Gigabyte X58 GA-X58-UD5
2) Forceware 258.96
3) EVGA Precision
4) W7 64 | Boinc 6.10.18 | both cards are EVGA GTX260 216s | using gpuz to watch load

Upon further research into this it looks like the second gpu will *usually* start out fine and then at some point overnight (or a few hours) drop to idle clock speeds, but still be processing WUs (judging by the memory/gpu load).

I noticed the #2 card was set to be the PhysX card in the NV control panel, I just disabled that for the heck of it to see if that has any affect.

Thanks for the input

Thanks T.A, that's good info.

I am running an older version of Precision and the problem your describing sounds exactly like what I'm seeing. I'll give the new version a shot as well.

Thanks again

Are you getting a driver crash sometime in the night? Mine did that until I put a rubber spacer between my cards to let more air in.

I found on my BFG GTX 260 any overclock on the memory over 1200 would
give an "Display driver stopped responding and has successfully recovered".
Whats your memory set at.

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I found on my BFG GTX 260 any overclock on the memory over 1200 would
give an "Display driver stopped responding and has successfully recovered".
Whats your memory set at.

I have the same problem, except that my GTX260 is the only GPU in the system. Just realised it's 5.40 am and I'm now late for work, so I'll check in on this later. I did change a setting in EVGA precision (1.9.4) that seemed to help, but I can't remember what it is.

Giz.

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Just for reference, I ended up going with an older NV driver that I'm using on another rig, Forceware 197.45.

That seems to have done it. Before I was getting driver crashes every 2-3 hours, so far I'm 14 hours with zero errors. So far so good.

Since nobody else has mentioned it, here's what I did when I realized that I had the same problem: HowTo - Prevent GTX 200 Series Downclocking using RivaTuner.
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