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3 Way Sli possible issue?

post #1 of 10
Thread Starter 
Sup everyone,

I just got my 3rd 670 and my gpu usage has plummeted as soon as tri-sli is active. Sli was almost all the time 96-99% now tri-sli is at most 45%. I am not sure why this would happen. Anyone have an idea?
post #2 of 10
How much do you have your 2500k overclocked? Does it happen with all games or just certain ones? It generally means that your CPU can't keep up with the GPU work load, or that you have too low of a screen resolution (which again means that the CPU can't feed the GPU's enough info) - when I had tri 580's I had to have my 2600k clocked at 5Ghz and running Nvidia surround in order to not have low GPU usage thumb.gif
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post #3 of 10
It depends on your CPU overclock, your monitor resolution, and the game.

3 way SLI is generally quite a headache.
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post #4 of 10
Thread Starter 
I currently have it oc'd to 4.2...Ill push it higher and see what happens. It happens with all games that im playing at the moment. Borderlands 2 & dayz were easily pushing the gpu usage to 98% now it never goes past 45%.
post #5 of 10
I never got Dayz to work SLI for me lol

I hated that game for that
    
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post #6 of 10
as a few others have stated. try and push that over clock a tad higher and i would always try re installing drivers... tri sli can be finicky to say the least, but when you get it working it's awesome
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post #7 of 10
It's due to being @ 1080p mate, you need to become more GPU bound ie; higher resolution

Very few games scale beyond 2 GPU's @ 1080p. You could overclock your CPU a bit more as this will help to some degree, but it won't change the situation that much.

TRI SLI/Quad SLI is only really used in surround, otherwise nothing will utilise them (apart from benchmarks like 3DMark11 etc)
 
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post #8 of 10
Quote:
Originally Posted by Mhill2029 View Post

It's due to being @ 1080p mate, you need to become more GPU bound ie; higher resolution
Very few games scale beyond 2 GPU's @ 1080p. You could overclock your CPU a bit more as this will help to some degree, but it won't change the situation that much.
TRI SLI/Quad SLI is only really used in surround, otherwise nothing will utilise them (apart from benchmarks like 3DMark11 etc)

This.
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post #9 of 10
What MHill said.

What happens with Heaven bench, maxed out? Do you get full usage or close to it on that?

I'm actually surprised if you always see full usage on Borderlands 2 with SLI 670's, since I quite often run into spots in that game where I'm running at like 40fps and 50% usage on my single 670.

BL2 at this stage seems to have the same glitch that Skyrim had when it first came out ... IOW there's certain areas where the game becomes hugely CPU-bound, using very little GPU and running a low FPS (and, strangely, while also running lower % CPU usage).
Edited by brettjv - 9/28/12 at 4:09pm
    
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post #10 of 10
Thread Starter 
Well I oc'd to 4.6 and i went back to 2 cards and now the usage still will not get any better in any game i play. I just dont get it.

In heaven its about 96-98% usage. I got 3385 on Extreme with everything maxed out (this good???).
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