Quad SLI 295 issues

[methimpikehoses]

Hopefully someone with a pair of these cards can chime in...

Having serious heat/fan issues with new quad setup. Was playing 2k10, and the 295 fans--on auto--are going full bore, then I get a BSOD. Haven't seen the blue screen in a long time. I have a well ventilated case and my single GTX 295 was very quiet. Now both fans seem to want to ramp up quickly. Any suggestions from quad SLI vets?

-SR

[Roliath]

jakup?

[bob saget]

Oh so you did end up getting a second one? Damn. Pics of setup? Oh and hopefully you get your issue resolved :)

[snowmanwithahat]

Mind starting up evga precision and recording the temps you're seeing?

I'm curious what qualifies as "too hot" because I've been seeing with my 285 temps in the 80's and 100% fan load and it never has issues.

Also, have you tested the new card alone to isolate whether or not that's an issue?

[GIGARAM]

i would check the second card you got, i had a similar problem with a setup i did for a friend with 2 280 gtx they would overheat and bluescreen tuned out one of the cards was faulty
hope this helps

[methimpikehoses]

I'm sure the second card is not faulty unless something happened to it in transport. I might try switching the master and slave and see what happens.

The only other issue is that one card is a GTX 295+ and the other is stock clocks, but I don't see why that would cause heat issues.

[bacon12]

What are the temps when it blue screens? Only think that would be an issue with the + being the primary is if the other card couldn't handle the clocks that the + is running at.

[Kakeshoma]

Use EVGA precision and enable Show in On-Screen Display, and choose GPU1 and GPU2 temperatures...

[methimpikehoses]

I switched the cards, and the problem seems to be corrected. Played a round of 2k10 and the fans stayed at a normal quiet speed. We'll see how it goes.

[DarthBeavis]

I have Quad SLI (dual PCB cards) but am on water. Let me know if you need some comparison numbers. I have CPU, NB/SB/Mofsets from one 360 Rad and GPUS from another but all on one loop (will have them on two Feser 480 rads when I do the rebuild in the painted case when I get it back though probably will have a couple Fermis in it instead).

[Bman212121]

I switched the cards, and the problem seems to be corrected. Played a round of 2k10 and the fans stayed at a normal quiet speed. We'll see how it goes.

IIRC when you have to unmatched cards the primary card will control the clock speed for both. So it might be possible that the 2nd card was overclocked to match your first card, causing it to not work right. (Basically the same thing bacon said)

[Butter Bandit]

IIRC when you have to unmatched cards the primary card will control the clock speed for both. So it might be possible that the 2nd card was overclocked to match your first card, causing it to not work right. (Basically the same thing bacon said)

I thought it worked like memory and would stick both GPUs at the speed for the slowest card. I think that's how it worked with my 6800GTs when I used SLI way back in the day.

[methimpikehoses]

IIRC when you have to unmatched cards the primary card will control the clock speed for both. So it might be possible that the 2nd card was overclocked to match your first card, causing it to not work right. (Basically the same thing bacon said)

Yes, that might have been it, but I'm surprised it caused such a disruption because 1) the clock speeds aren't that disparate, and 2) I even tried underclocking the fast one to match speed. Apparently the underclocking didn't work. :|

Seems to be okay for now.

DB, you may send me a spare watercooling setup in the mail, kthxbai. :lol:

[Rummy]

Glad you got it figured out and enjoy those 2 beasts.

[methimpikehoses]

So weird, the slave card (the faster one), still appears to be starting with faster clocks, until I force a downclock in EVGA precision. :eek2:

Also getting some graphics glitches that appear to be driver-related? Using the newest WHQL's. Ah, SLI.

[LabShark]

I keep my Quad fans at 40% default. 60-70% when gaming. No auto for me.

[ChrisRay]

So weird, the slave card (the faster one), still appears to be starting with faster clocks, until I force a downclock in EVGA precision. :eek2:

Also getting some graphics glitches that appear to be driver-related? Using the newest WHQL's. Ah, SLI.


Its not that wierd really. SLI now for a long time has allowed multiple shader/clock domains to work with SLI. Which is why its typically better to put the faster card in the primary. The faster clocked card will not overclock the other cards.

[methimpikehoses]

Its not that wierd really. SLI now for a long time has allowed multiple shader/clock domains to work with SLI. Which is why its typically better to put the faster card in the primary. The faster clocked card will not overclock the other cards.

I was getting issues with the faster card as primary, which seem to be resolved now. And now my faster slave card still appears to be starting with faster clocks, though I have since synced them.

You're saying that I shouldn't have gotten errors for have the cards at different speeds?

[ChrisRay]

Nope. You shouldn't have to sync them at all.

[methimpikehoses]

Maybe there is something else going on, but they are fine now, so I won't mess with it for now. :)

[bob saget]

your computer sucks. send to me. bye.