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GTX 295 Performance Question

post #1 of 13
Thread Starter 
Hey guys quick question.

I wanna use 2x GTX 295 but not in Quad SLI.

I wanted to know if it were possible to dedicate one card fully(1xGTX 295 with both chips) to physx and only use it for AA and AF.

That way the other card will not be strained so much and theoretically should give me better FPS.
I know it does not use 2x 896 MB but it seperately uses the Vram of 896 two times.

In the Nvidia Panel it is possible to use Card A , Card B and let App decide.
But is there a way to have the full card be dedicated to physx?
And in order to execute that plan I would not need and SLI bridge right?
And prove me wrong but that should give me better and smoother performance than Quad SLI.
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post #2 of 13
Well, to an extent, yes. PhysX will only work on one of the second cards cores, though, so it's a bit of a waste.

There isn't any way to dedicate different ingame graphical elements to a separate card, as far as I know.
    
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post #3 of 13
You can only use one gpu for physx.
post #4 of 13
lol, GTX295 quadSLI will be better than GTX295 + GTX275 physX.
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post #5 of 13
Thread Starter 
Yes but there is a program that specified for SLI setups which can dedicate certain graphical settings such as AA,AF VSync etc to one card...Also the Nvidia Control Panle features the choice of wheter to let the app decide or the user how the abovementioned settings are handled.

I am not sure if that program has also been modified to have a full GTX 295 and not just one card be dedicated to those settings since I have only seen it on a single GPU SLI setup.

Quad SLI GTX 295 still only has 4x896 MB which are not used as 2x1792MB yes but at least it uses 2x896 MB seperately.
I looked around in the Nvidia Control Panel a bit and maybe it works but right now I do not think that it would give me better performance than an actual Quad 295 because of the advanced Vram amount.

Also the way the cards are used in Quad one card will heavily be used for certain aspects as the other one will handle the rest.
Actually there is quite an intelligent algorythm behind it to reach the two cards highest potential.

Max overclocked in Quad I think they will provide massive power.
And I saved quite a bit on it^^
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post #6 of 13
there's a SLI antialiasing mode. i do suggest u leave ur cards in quad SLI though as that will net overall higher frame rate.
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post #7 of 13
Thread Starter 
Quote:
Originally Posted by james8 View Post
there's a SLI antialiasing mode. i do suggest u leave ur cards in quad SLI though as that will net overall higher frame rate.
Where exactly is there an SLI AA mode?

And I hope you mean Quad SLI will give higher FPS cause that is the whole point^^

The Quad setup will use 1792 MB parted ...meaning that2x 896 MB will be used seperately not simultaneously though technically 1792 MB of Vram are used.

Which card will be used for AA and AF I don´t know ..Nvidia´s algorythm will decide that.

What I am interested thoug his how to setup the cards so they will yield there highest potential.

Do I dedicate in the Nvidia control panel or let the application decide?
And please explain the SLI AA mode thing a little further.
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post #8 of 13
ok in quad SLI mode, only 896 MB of ram is usable just like normal multi gpu mode.
about SLI antialiasing
http://www.slizone.com/page/slizone_faq.html#d1

yes quad SLI will give higher fps in games that benefits from SLI.
you should enable quad SLI, or click on maximise 3D performance in newer drivers, then either select the GPU on the card not connected to ur display for physX or just let nvidia auto select which usually works.
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post #9 of 13
Thread Starter 
Quote:
Originally Posted by james8 View Post
ok in quad SLI mode, only 896 MB of ram is usable just like normal multi gpu mode.
about SLI antialiasing
http://www.slizone.com/page/slizone_faq.html#d1

yes quad SLI will give higher fps in games that benefits from SLI.
you should enable quad SLI, or click on maximise 3D performance in newer drivers, then either select the GPU on the card not connected to ur display for physX or just let nvidia auto select which usually works.
THX didn´t know Nvidia drivers offered a SLI AA mode^^

But a Quad SLI 295 setup is supposed to deliver 2x896 MB just not used together but seperately.
Each card individually uses 896MB.
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post #10 of 13
no, a quad sli setup has onboard 4x 896 which is *use calculator* 3584 MB of memory. but only 896 is usable as the rest is cloned.
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