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Need some help with a quick SLI issue - Page 4

post #31 of 63
Thread Starter 
Quote:
Originally Posted by Divey View Post

That's good. Well if all else fails you can adjust the clocks to match using msi ab and test from there.

Yeah I was thinking of down-clocking the KFA2
Quote:
Originally Posted by Luck100 View Post

Why do you want to flash the bios? You can set fan profile and clock speeds in precision X or afterburner. It's not just for overclocking, you can underclock your card if it's getting too hot and fan can't cool it.

Having said that, I'm running two 670's with reference coolers around 1200 MHz and temps max out in the 60's on BF4 with my custom fan profile. The factory fan profile seems to favor silent operation and the cards run in the low 80's.

Could you share your fan profile bro?
Both cards have the good "twin forz" design - thus heat wise they should be fine - but for some reason (I suspect it is due tot hem being pushed at 1440p) it gets hot.


EDIT: Downclocked the 2nd GPU - as I think my primary GPU would have trouble getting to that - I remember having slight problems at +55 core clock.
I'll try OC'ing the first one, when I know I'm fully stable - so that both match up to the FASTER speed.




Just out of interest the pixel fillrate and texture fillrate are different - does that make much of a difference?
Edited by Totally Dubbed - 3/30/14 at 5:03am
post #32 of 63
Here's my settings and fan profile. Despite what I said earlier, I actually have my clocks boosted to the max stable overclock (not trying to match the clock speeds). The reason for that is that my primary card can clock higher and I can't run SLI on some games (so I want the max performance out of the one card). Batman Arkham Origins is a funny one. It does run in SLI, but if you're playing with PhysX options cranked up it performs better with SLI disabled. I think it runs PhysX entirely on the second card with SLI disabled.

For the fan profile, I have it set so it can keep games in the 60's or below. Benches tend to run in the 70's. I like have a few degrees of hysteresis so the fan doesn't keep jumping up and down too much.


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post #33 of 63
Thread Starter 
Quote:
Originally Posted by Luck100 View Post

Here's my settings and fan profile. Despite what I said earlier, I actually have my clocks boosted to the max stable overclock (not trying to match the clock speeds). The reason for that is that my primary card can clock higher and I can't run SLI on some games (so I want the max performance out of the one card). Batman Arkham Origins is a funny one. It does run in SLI, but if you're playing with PhysX options cranked up it performs better with SLI disabled. I think it runs PhysX entirely on the second card with SLI disabled.

For the fan profile, I have it set so it can keep games in the 60's or below. Benches tend to run in the 70's. I like have a few degrees of hysteresis so the fan doesn't keep jumping up and down too much.



Would you thus suggest I run the KFA23 as my primary card?
As it has no warranty - I just don't want to stress it as much as the MSI - thus my thinking of leaving the MSI as the primary card.

Thanks for the profile +rep again
post #34 of 63
Makes sense to have your stronger card as the primary, for those times when SLI doesn't work. If you're worried about long-term stress on the card, just make two profiles. One where you downclock faster card to match the weaker card, for everyday non-stressful SLI. Then a second profile for single-GPU where you clock the faster primary card to a higher stable overclock.
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post #35 of 63
Thread Starter 
Quote:
Originally Posted by Luck100 View Post

Makes sense to have your stronger card as the primary, for those times when SLI doesn't work. If you're worried about long-term stress on the card, just make two profiles. One where you downclock faster card to match the weaker card, for everyday non-stressful SLI. Then a second profile for single-GPU where you clock the faster primary card to a higher stable overclock.

ah then in that case, I'll leave it as it is - leaving the weaker MSI card on top.
I think the MSI COULD OC to +52 - but I had troubles at +55 with mem clock too.

I'll see!
post #36 of 63
Quote:
Originally Posted by Totally Dubbed View Post

Yeah I was thinking of down-clocking the KFA2
Could you share your fan profile bro?
Both cards have the good "twin forz" design - thus heat wise they should be fine - but for some reason (I suspect it is due tot hem being pushed at 1440p) it gets hot.


EDIT: Downclocked the 2nd GPU - as I think my primary GPU would have trouble getting to that - I remember having slight problems at +55 core clock.
I'll try OC'ing the first one, when I know I'm fully stable - so that both match up to the FASTER speed.




Just out of interest the pixel fillrate and texture fillrate are different - does that make much of a difference?

The pixel fillrate and texture fillrate are different because of the different bios. I had the same thing with my cards and it didn't seem to affect anything. I would to agree 1440p will create more stress on the cards creating more heat.
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post #37 of 63
Not sure your situation with using vsync or custom .cfg files with certain games, but I cap the frame rate on my GTX 670 cards in SLi. Even though I've only got a 60Hz monitor I cap everything at 120FPS using either a custom .cfg file or nVidia Inspector.

Otherwise the cards have a tendency to "run away" and pump out max frame rates even though the monitor can't display them. When that happens my cards (especially the top card) can get crazy hot, so the fans start going crazy and eventually the top card starts throttling.
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post #38 of 63
Thread Starter 
Quote:
Originally Posted by wevsspot View Post

Not sure your situation with using vsync or custom .cfg files with certain games, but I cap the frame rate on my GTX 670 cards in SLi. Even though I've only got a 60Hz monitor I cap everything at 120FPS using either a custom .cfg file or nVidia Inspector.

Otherwise the cards have a tendency to "run away" and pump out max frame rates even though the monitor can't display them. When that happens my cards (especially the top card) can get crazy hot, so the fans start going crazy and eventually the top card starts throttling.

well at 1440p my GPUS are having a hard time at 100FPS biggrin.gif
My monitor OC's to 96hz / 110hz - so I don't have to worry about capping the FPS smile.gif
post #39 of 63
Gotcha. I've been yearning for a 2560x1440 monitor but haven't pulled the trigger yet. Still trying out to make it all fit into a rather cramped play space. I'm still at 1920x1200 frown.gif
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post #40 of 63
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Quote:
Originally Posted by wevsspot View Post

Gotcha. I've been yearning for a 2560x1440 monitor but haven't pulled the trigger yet. Still trying out to make it all fit into a rather cramped play space. I'm still at 1920x1200 frown.gif

Yeah I just recently made the jump.
Got a question about the SLI config though - seems like the 2nd GPU is limited to 75% fan - which COULD be causing problems for my main MSI one at 88%.

Should I UNTICK syn settings?
And then manually downclock the faster GPU?
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