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Anyone run 3 way 680`s @ 7680x1440 Thanks
- Thread starter Crezzlin
- Start date
What kind of "scaling problems"?
At 7680x1440 your biggest concern will be VRAM. I used to run (some...) games on 7680x2560 with my SLI GTX480s [so 1.5Gb VRAM as opposed to the 2Gb in your GTX680s].
There were really only a few games that could run at triple-screen res without hitting the VRAM limit and taking a massive tank in framerate (down to well below 1fps). Even some older games (like Fallout 3) which ran with a decent framerate would tank with any amount of AA enabled.
I think that far too much fuss is generally made over the amount of VRAM, but running a triple screen setup with >1080p screens is one scenario where the concern is justified.
[edit - unless you're running 4Gb GTX680s, in which case the above will probably not be an issue with most games]
At 7680x1440 your biggest concern will be VRAM. I used to run (some...) games on 7680x2560 with my SLI GTX480s [so 1.5Gb VRAM as opposed to the 2Gb in your GTX680s].
There were really only a few games that could run at triple-screen res without hitting the VRAM limit and taking a massive tank in framerate (down to well below 1fps). Even some older games (like Fallout 3) which ran with a decent framerate would tank with any amount of AA enabled.
I think that far too much fuss is generally made over the amount of VRAM, but running a triple screen setup with >1080p screens is one scenario where the concern is justified.
[edit - unless you're running 4Gb GTX680s, in which case the above will probably not be an issue with most games]
My advice is to check your CPU usage whilst in game (BF3/Hitman absolution for example) and if it is over 80%, you are bottlenecking. If not, it is drivers not allowing decent scaling for triple cards.
I assume you are on 4GB cards?
I assume you are on 4GB cards?
Soldato
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Good luck
So - you're getting "worse" performance with three cards than with two (in terms of raw FPS)? Or are you seeing stutter and other more subtle issues with the three cards?
...Either way I suppose that there isn't much that you can do about it - you're at the mercy of Nvidia's driver team. Scaling with three GPUs has always been less reliable than dual-GPU scaling though.
Hi, its performance more than FPS i did see a increase in fps in BF3 from 50-65 steady but at 65fps on 3 cards its very choppy, no matter what i do, if i reduce the graphics etc it will help a lot but with 2 cards on ultra its still smooth.
Hi I used 306 yesterday and it made no difference then I went back to current and it killed it, ha i was getting 20fps, time for a fresh install again.
How does your perform on 2 cards?
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Very good with 306.23. I use AB 2.2.3 because it is the only one which allows me to use the art money hack on voltages and it was reporting GPU usages on both cards as ~80% but when I checked with GPU-Z, both GPU's were at 99%.
One of them is lieing anyways
I do feel it is the crappy drivers holding you back or your CPU is.
Most likely it's microstutter - that is where frames are output at irregular intervals. While the framerate counter reads the extra frames being output, the way your eye perceives irregular frame output means that the scene can seem less smooth than a lower framerate output at regular intervals.
The intensity of microstutter increases significantly when adding a third GPU (and is all-but nonexistent with a single GPU). If you search, I've posted loads of in-depth stuff about it on these forums in the past. I even wrote a little program to compute the amount of microstutter by analysing FRAPS benchmark logs.
If you're interested, I'm sure I could dig it out.