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SLI Crashing

post #1 of 61
Thread Starter 
I've got two GTX480s. They run perfectly fine when only one is enabled. But when SLId, the instant I try running anything the whole PC crashes.

My first guess would normally be the PSU being unable to handle the load, but it IS a 1000W unit, and this problem only started yesterday (I was able to SLI before that).


Also, I did run stress tests on everything - Linpack, memtest86, and furmark on each card separately. No errors anywhere. And I also tried a full reformat using a spare HDD and that didn't fix anything.
Edited by Manyak - 3/25/11 at 7:09am
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post #2 of 61
you try running the other card as the main card and see if you have any problems with it? Mabye reinstall drivers?
post #3 of 61
Thread Starter 
Quote:
Originally Posted by Newbie2009 View Post
you try running the other card as the main card and see if you have any problems with it?
Yup, it worked fine.
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post #4 of 61
Quote:
Originally Posted by Manyak View Post
Yup, it worked fine.
Its a strange one. You have another pci-e slot you can try?
Id have to say, if it was the PSU, the machine would probably just power off, no error screen.
The fact that you can enable sli shows the other pci-e slot is probably working ok. And both cards work ok individually.

So I would wipe video drivers & reinstall and see if it fixes the issue.
Edited by Newbie2009 - 3/25/11 at 7:16am
post #5 of 61
Thread Starter 
Quote:
Originally Posted by Newbie2009 View Post
Its a strange one. You have another pci-e slot you can try?
Yeah, but it'll take all day to try it with the way my water cooling is set up. If you've got any other ideas I'd like to try those first lol.
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post #6 of 61
You have a molex connected to the motherboard for extra power to the PCIe slots?

Have you got the latest Nvidia Drivers installed?

Have you gone into bios and disabled automatic restart on fail. Then you get a BSOD (blue screen of death) with a handy error code.

Im guessing its something to do with drivers
 
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post #7 of 61
Try rolling back the computer to a previous day?
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post #8 of 61
Thread Starter 
Quote:
Originally Posted by Jump3r View Post
You have a molex connected to the motherboard for extra power to the PCIe slots?

Have you got the latest Nvidia Drivers installed?

Have you gone into bios and disabled automatic restart on fail. Then you get a BSOD (blue screen of death) with a handy error code.

Im guessing its something to do with drivers
No, there's no plug.
Yes
Oh yeah, lemme do that
I hope so, even though I only updated them after the fact


Quote:
Originally Posted by realcyberbob View Post
Try rolling back the computer to a previous day?
I have system restore disabled.
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post #9 of 61
Are you running them in stock settings?

Do you have the current drivers?

Try to do a process of elimination by using one card at a time and replicate what your doing and see if you still have the same issue.
post #10 of 61
Thread Starter 
Ok there's no option in my BIOS to disable auto restart....and now that I think of it it doesn't matter anyway since the computer just freezes completely, it doesn't restart. It gives a blank screen for a while, and about 30 seconds later the monitors go into power save mode.

@s3v3n: yes the very first thing I tried was disabling all my OCs. Like I said, this is even happening on a brand new reformat with the latest drivers. And both cards seem to work fine when only one of them is being used (I'd select one as main in software, not physically disconnect anything).
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