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Gtx 580 physics

post #1 of 8
Thread Starter 
Hey guys
I got 2 gtx 580 with i7 970 at 4gh
My question is should put the physic option to dedicated since I have 2 580 and what's the difference between dedicated and auto and non dedicated?
Pls Guys some advice and info
Thanks
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post #2 of 8
Use auto. If you use dedicated I believe that you won't get full performance from the physx one. Most people only have a dedicated physx card if they have like a gts 450 laying around or something.
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post #3 of 8
Thread Starter 
If I use one card for physics and the other for gaming how do I do that?
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post #4 of 8
Quote:
Originally Posted by TAr View Post

If I use one card for physics and the other for gaming how do I do that?

Set it in the nvidia settings. But I don't think you should. Not many games even utilize physx IIRC
It's a computer
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2500k 4.5ghz @1.35v Asrock Extreme 3 Gen 3 Asus GTX 470 725/1694 @1.025v EVGA GTS 450 900/1804 (PhysX) 
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8gb Gskill 1600mhz 640gb, Seagate 1tb Spinpoint F3, Kingston 60gb SSD LG Combo Thermaltake SpinQ 
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It's a computer
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2500k 4.5ghz @1.35v Asrock Extreme 3 Gen 3 Asus GTX 470 725/1694 @1.025v EVGA GTS 450 900/1804 (PhysX) 
RAMHard DriveOptical DriveCooling
8gb Gskill 1600mhz 640gb, Seagate 1tb Spinpoint F3, Kingston 60gb SSD LG Combo Thermaltake SpinQ 
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post #5 of 8
Thread Starter 
Ok thanks
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post #6 of 8
Thread Starter 
Than what's the purpose of dedicated to physics
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I7 970 AT 4 GH
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post #7 of 8
DO NOT dedicate a 580 to physx. It'll kill your performance.

http://www.nvidia.com/object/physx_faq.html

very few games even take advantage of this technology.
post #8 of 8
Here's the deal ...

You can EITHER run your cards in SLI (in which PhysX processing, if needed, will 'share' resources with the rendering duties on one of your two cards), OR you can dedicate one card to the regular rendering, and one to PhysX, thus 'breaking' your SLI set.

The ONLY TIME you MIGHT want to 'break' your SLI and dedicate one card to physX is if a game comes out that's generally pretty easy to run, graphically, BUT the PhysX component is VERY taxing.

The only games I can think of offhand at this moment where you *might* want to do that are: Alice: Madness Returns, Mafia 2, and maybe the Batman Arkham Asylum.

For general everyday usage, tell NVCP to run PhysX on card 2, but DON'T dedicate it to PhysX (because that 'breaks' SLI).

Very, very occasionally you might play a game, like I say, where it might run a little better if you change to the other configuration, but it will only ever be a game that supports Hardware-Based (GPU) PhysX. And not even all of those ...
Edited by brettjv - 2/15/12 at 4:10pm
    
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