Problem with GTX 285 SLI

DanishDevil · Nov 2, 2009

First off, these are two BFG GTX 285 OC's running on the OC2 BIOS. Just bought them Saturday.

I hooked them up, SLI connector and all, booted, let it figure out what was going on (on the latest drivers), and rebooted, then enabled SLI. Everything was peachy king, and I hit up some Borderlands (for a few hours).

A total of 4 times in about 3 hours of gaming, this happened: The game froze. Just like hitting pause on a movie. I had to CTRL-ALT-DEL and start task manager, and "Switch To" the game, and it resumed as usual, a few times killing me in the process (slightly irritating).

One things that I have noticed is that one of the cards runs warmer than the other by a good 5-10C.

Could this be the display driver crashing? A bad card? Should I test them separately? Run a benchmark to see if my scores are ok (and possibly detect a bad OC?)

:toast:

in advance!

Anath · Nov 2, 2009

I would test the individually. Also I am sure you know this but when you sli a lot of cards cant oc as high while running an sli configuration. I am not saying you cant oc them just i have seen from my own experiences and with others that the cards tend to artifact/crash when high oc's are paired in a sli or xfire configuration. Have you monitored the card's heat while under load? I know that when this happened to an old card when it got too hot the game would freeze. I just upped the fan speed and it didnt happen anymore.

Bo$$ · Nov 2, 2009

up the fan speed, one card is sucking up all the radient heat from the second so 1st card runs 5-15 degrees hotter, try underclocking to find out if the cards are stable at the clocks, if not then might be a heat issue or a driver issue

DanishDevil · Nov 2, 2009

They're 1 slot apart at least, so they're not sandwiched. I'll monitor some temps then give them a shot individually.

zithe · Nov 2, 2009

Is the top one hotter? It could be sucking heat off of the back of the bottom card and blowing it over itself.

va4leo · Nov 2, 2009

I have the BFG GTX 285 OC2s. I experience the same problems. It used to be tha the Light on the Graphics card goes red (indicating a possible lack of power, however, this is unlikely as i have a 1000w PSU). However, after the recent reformat (upgrade to Win7), I now experience similar to yourself, freezes (wihtout the ability to ctrl+alt+del). Have to restart PC.

Me thinks it could be a Direct X issue.

In dividual cards work flawlessly. Its only when runnign SLI and in stressful games. Its odd. Temperatures NEVER exceed 70C with my profiles settings.

To the OP :

Using nVidia Tools, i got the fan graph set at 10C-20%, 44C-40%, 85C-99%. Maybe give that a try?

Maybe try updating DirectX? A number of the times this was an error.

DanishDevil · Nov 2, 2009

zithe said:
Is the top one hotter? It could be sucking heat off of the back of the bottom card and blowing it over itself.

They're sitting flat, not in a case.

zithe said:
Is the top one hotter? It could be sucking heat off of the back of the bottom card and blowing it over itself.

va4leo said:
I have the BFG GTX 285 OC2s. I experience the same problems. It used to be tha the Light on the Graphics card goes red (indicating a possible lack of power, however, this is unlikely as i have a 1000w PSU). However, after the recent reformat (upgrade to Win7), I now experience similar to yourself, freezes (wihtout the ability to ctrl+alt+del). Have to restart PC.

Me thinks it could be a Direct X issue.

In dividual cards work flawlessly. Its only when runnign SLI and in stressful games. Its odd. Temperatures NEVER exceed 70C with my profiles settings.

To the OP :

Using nVidia Tools, i got the fan graph set at 10C-20%, 44C-40%, 85C-99%. Maybe give that a try?

Maybe try updating DirectX? A number of the times this was an error.

Will do. Thanks for the tips.

PP Mguire · Nov 2, 2009

Just crank them to 100 while testing. If your temps are cool and it still freezes try underclocking. If that dosent work its software.

erocker · Nov 2, 2009

You should make sure all your voltages are stable. If the rest of your system is OC'd and stable, adding SLi into the mix can pull a lot of volts, perhaps causing not enough voltage to another component. While your PSU can handle it, you may just need to bump up the voltage a bit elsewhere. Have you tried running your entire system stock?

DanishDevil · Nov 2, 2009

Everything is stock at the moment except for the cards, which I would have to flash to their normal OC bioses.

erocker · Nov 2, 2009

va4leo said:
Maybe try updating DirectX? A number of the times this was an error.

Here's the link if you haven't done it.
http://www.microsoft.com/downloads/...38-DB71-4C1B-BC6A-9B6652CD92A3&displaylang=en

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Problem with GTX 285 SLI

DanishDevil

Anath

Bo$$

Lab Extraordinaire

DanishDevil

zithe

va4leo

DanishDevil

PP Mguire

erocker

*

DanishDevil

erocker

*

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