I am having constant problems with this host:

http://www.gpugrid.net/show_host_detail.php?hostid=107176

Device 0 will error out all WUs, device 1 does not seem to have any problems.

Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz
Z68 board, internal graphics deactivated.
Microsoft Windows XP Professional x64 Edition, Service Pack 2, (05.02.3790.00)
[2] NVIDIA GeForce GTX 570 (1279MB) driver: 26658. Stock clocks. No SLI bridge.

Brand: 2x Gigabyte GeForce GTX 570 OC (GV-N570OC-13I). The crashing device interestingly is a newer version without voltage control, but using higher voltages by default according to GPU-Z.

Any ideas?
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What PSU are you using in this host? (a good 800W (preferably 80+ Gold) is the minimum for your configuration)
A more recent driver (275.33 or 280.26) for the GPUs would be nice to have.
What are the running temps of the cards? Over 90°C is dangerous, but the lower the better. Maybe you have to increase the fan speed of both GPUs with MSI Afterburner (it works with every manufacturer's cards)
Maybe you should:
- disable any screensaver.
- swap the cards, to see if the card or the slot is the root of the problem.
- downclock the failing GPU.
- install the latest chipset driver from intel.

The PSU might be a bit short, but it does handle more power hungry apps like PG without problems. It is a Seasonic X-650W.

Temps with PG have been 70°-80°C as peak on hottest days, using 900Mhz GPU clocks. So running GPUGRID on stock I did not even bother to check, something below 70°C. Currently running Einstein at 51°-62°C (900Mhz).

I checked one 28x WHQL driver, no improvement with that problem. Intel chipset driver is 9.2.0.1026
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Cheers for the hints, guys. I will try setting fan speed and fiddling with RAM clocks around 1500 MHz first. It's a Silverstone Fortress case, so airflow hopefully should not be the problem.
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The PSU might be a bit short, but it does handle more power hungry apps like PG without problems. It is a Seasonic X-650W.

I am currently waiting for the Platinum series to start consecutive upgrades of most PSUs, so it should get an X-750W. Last time load measured was when running PG around 75% or so.

It seems fan/RAM settings did the trick. :) For some reason I ignored device 0 sees about 10°C higher temps, most likely because the Gigabyte cooler does exhaust some hot air into the case while this case favours all-exhaust devices. Cooler set manually to 62%, so it keeps the card in a better range now, not sure if memory downclocking still is needed.

If that's running stable, I will try to find some better clocks though. :P Thanks for the tips!





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PS, latest check of power draw:
Running 2x GPUGRID ~447W average. 450W peak. ~68% PSU load.

No trashed WU since adjusting fan and RAM. :) Cheers.
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Wow, that poor little PSU. It's a good thing it's a Seasonic, or it probably would have already burst into flames and exploded.