RAC drop?

juan BFP
juan BFP
Joined: 18 Nov 11
Posts: 839
Credit: 421443712
RAC: 0

RE: Well seems it might be

Quote:

Well seems it might be a driver issue with the 6600ti.

Temps are fine but WUs all seem to error.

Found this thread about it on Seti but dont know if E@H has similar issue.
http://setiathome.berkeley.edu/forum_thread.php?id=69735

Anyone else with the same card have issues?

Check if you have the Intel Open-CL driver error, some of my hosts starts to get some error because the Windows Update install the Intel Video Driver (Open CL included) over the Nvidia driver - that should not be happening but happens in some hosts, why i have no ideia maybe the MB or related to the chip set used. To fix this bug just unistall the Intel Open-Cl driver (just the Open CL not the entire video driver) from you Control Panel. After that restart your computer, if that´s the problem the errors will stop. If thats fix then is nothing related to you GPU, just a "friendly bug" sended by our friends at M$.

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Darren
Darren
Joined: 13 Nov 09
Posts: 38
Credit: 171972935
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hmm you might be onto

hmm you might be onto something there.

I check my update logs and alot of update were installed on the 17th and most of the validate erros stared from the 18th.

Im not seeing anything anywhere in windows that looks like it related to Open CL tho? Where is it? Google isnt very helpful to find it if I have it or not.

Cheers
Darren.

juan BFP
juan BFP
Joined: 18 Nov 11
Posts: 839
Credit: 421443712
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I see something about in some

I see something about in some place, realy don´t remember where, maybe in one Nvidia development forum. I was lost to, since i have nothing to loose because all DL wroks for few moments and end on an error, I try and works.

Realy have no ideia why it happenings with one host and no in another, specialy because i normaly use the same MB & configuration, even the same windows corporate licence and the updates are the same of course (until now just 2 of my 8 hosts presented the problem).

Go to your control panel, install/unistall programs and then find Intel Open CL click on then and then unistall the program, will make no harm to your computers since you use the GPU not the CPU to do the job. Don´t forget to restart the computer after that to clear the old task from memory.

Could be a long shoot, but works with me. Hope thats could help you to.

Of course you need to have a MB with an Intel video chipset... But that is easy to check, if you don´t know, if the program apears on the control panel then you have the Intel Video chipset

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Darren
Darren
Joined: 13 Nov 09
Posts: 38
Credit: 171972935
RAC: 0

Well there is no Intel Open

Well there is no Intel Open CL as far as I can tell but I did disable onboard video in the BIOS so Ill run things for a day or so and see if that does any good. It maybe some wierd bug relating to new Nvidia drivers not interacting well with "Auto" graphics selection in the Bios.

Now will wait a day or so and recheck it all....

Many thanks for help.

juan BFP
juan BFP
Joined: 18 Nov 11
Posts: 839
Credit: 421443712
RAC: 0

I allways disable my MB Video

I allways disable my MB Video when i use a GPU, something i agree with you is a "wierd" situation, not very clear to the comunity. When i read about that, in a missing corner of some unknown forum, the explanation was: for some "unknown" reason when the programs call for some video routine they are routed to the MB video not to the Nvidia, then the program crashes. But Nvidia are allready known the problem and a fix will be avaiable soon.

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Darren
Darren
Joined: 13 Nov 09
Posts: 38
Credit: 171972935
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Well I am still getting the

Well I am still getting the WU invalids on the one i7 machine. I know nothings overheating in it and the onboard gfx is turned off. Any reported wierd interactions between gtx560s and 660ti's?

Im fixing to repaste the 660 just to be sure even though its brand new (the 560 was repasted only a month or 2 ago so I know its fine).

Failing that Ill pull the cards and run them for a few days seperatly to see which one is causing issues.

Richard Haselgrove
Richard Haselgrove
Joined: 10 Dec 05
Posts: 2139
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You don't seem to have told

You don't seem to have told us your power supply rating. Inadequate 12V power, especially for the task start-up surge, is another common cause of GPU problems.

Darren
Darren
Joined: 13 Nov 09
Posts: 38
Credit: 171972935
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PSU is a 1kw thing dual 500w

PSU is a 1kw thing dual 500w rail.

I looked at power use and supply and discounted it as a possible issue as the 560 and 660ti use almost the same amount. This machine never gets turned off so there is no boot up overload issues and even tho it has 8 drives in it only 5 of them are rotating type the other 3 are 2x SSD and 1 optical.

I figure on boot it draws at most 700w and on running it should draw about 550w at most.

Im thinking its some compatibility issue with the 560 and 660 since it other than the borked WUs it runs as well at it always has.

juan BFP
juan BFP
Joined: 18 Nov 11
Posts: 839
Credit: 421443712
RAC: 0

A long shoot, did you test

A long shoot, did you test each GPU in separate? One at a time? Both Works?

Another not to LS: Your PSU can work as a single rail? You could be exaust the capacity of one rail with 1 GPU and a lot of HDD,SDD, MB, Fans, what else are conectec even if you have 1KW PSU. If you can´t use as a single rail, then that the case try to "load balancing" the power load of the others devices on the 2 rails.

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archae86
archae86
Joined: 6 Dec 05
Posts: 3145
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RE: I figure on boot it

Quote:
I figure on boot it draws at most 700w and on running it should draw about 550w at most.

Averaging 550 W does not mean the peaks are 550 watts and it is the peaks that the power supply has to cope with gracefully. As a retired electrical engineer, I used to believe that the folks urging amazingly high capacity rated power supplies for GPU's were exaggerating grossly.

Then I happened to buy two UPSes of a different model than I had used previously which showed an on-screen power consumption number as seen by the UPS, which updated somewhat faster than my Kill-a-Watt does. I was shocked to see much more time variation on the scale of a few hundred milliseconds than I had expected. And that is all the way out at the power cord of the machine, where the real short-term variation has been considerably buffered by the bypass capacitors in the PC power supply. So I don't know what the real variation in consumption at the GPU is, but currently believe it to be hundreds of watts (and I have a mere GTX 460).

It well may not be an issue for you, but I post this as a warning to others reading the thread that it may be an issue for them.

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