I'm trying another tack here - wonder if there is some bad memory on the card? After the short WU failed, I underclocked the memory a bit. The next short WU worked OK! OK there were a couple after that did not, but they have failed on other machines also. I've lowered the memory clock a bit more and will see how it goes. I've found a few memory testing tools which I will try also - if there's a memory problem, hopefully I can find a way to reliably show it that will allow the seller to verify the problem.

I notice that there are two BIOS versions for this card - one for cards with Hynix memory, the other for cards with Samsung memory. My card appears to be Samsung.

Ran some memory tests (memtestcl and memtestG80) with no errors (but probably need to run for a day or two to do a thorough check). Then set the card to reference GPU core clock (980/1045), and memory underclocked from 6008 to 5494. It has processed a NOELIA klebe successfully, and is now nearly 2 hours into a NOELIA 7MG (that is working properly with 38% memory controller load).

I also installed the 320.49 driver but this doesn't appear to have made any difference one way or the other (WUs were still crashing before I underclocked the memory).

Hm thats normal here. If wus begin to fail overvolt by 0.025V and underclock the mem by 100mhz was the recommend solution here in the forum. And it really works for me since a longer time now.

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DSKAG Austria: http://www.dskag.at

Driver resets are a known issue in windows that few people know about. There is a simple regedit that should cure the driver timeouts. I have used it on all of my ATI cards and it has worked perfectly. I don't see any reason why it shouldn't work on Nvidia cards too. I posted it once before but I don't know if anyone here tried it. I can post it again if you'd like to try it. The regedit will not do anything else to your system if it doesn't work.

Sure, post it, and thanks in advance.

Sorry for the delay. Copy and paste the entire code below (including the
Windows Registry Editor Version 5.00 part) into notepad. Rename it fix.reg or something else if you'd like as long as it ends with the .reg extension.
After renaming it right click on it and open it with registry editor. You'll get warnings about editing the registry. Just click yes and the code will be added to your registry. Reboot and you should be good to go. This should stop the driver has stopped responding messages and the errors to the WUs when the driver restarts.


Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Watchdog]
"DisableBugCheck"="1"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Watchdog\Display]
"EaRecovery"="0"

I run 320.18 and 320.49 with the GTX660's and the errors are Noelia's or a short run from Santi. Almost none Nathan's error out.
Some WU's have a MCU load from 1% and took 50 hours on my rig, but without error. I guess its luck, if the Noelia's finish or error. I don't make all the fuss with the drivers as other projects WU's seem to do well with them.

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Greetings from TJ