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Single Slot Physx's card - Page 2

post #11 of 15
I think the single slot GTS 450 (eg the MSI one mentioned in #3 above) is a good match with your upcoming 3-way GTX470 SLI.

One reminder: your 910W PSU might be a little too close for comfort, especially after adding a Physx card. Just be careful.
post #12 of 15
Quote:
Originally Posted by Qosmio View Post
If you go SLI with any high end card like a 470 or above, I see no reason to have a dedicated PhysX card then as the GPU can easily handle those processes on the side while maxing out the game.
Sure, if you don't mind really crappy scaling when the physX demands are high.

The problem is that PhysX runs on one gpu only, and because cards in SLI have to run at the same speed, the hit from physX gets doubled, resulting in bad scaling.

And like Hodgy said above, cloth PhysX run on the CPU unless you have a dedicated PhysX card (but he forgot to say 'in Mafia 2' ), and this can put some major hurt on FPS if there's a lot of cloth physX in a scene.
Edited by brettjv - 1/27/11 at 5:39pm
    
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post #13 of 15
It is like a ''Two Men In Three-Legged Race''. When one team member is bogged down, the other team member has to slow down. Similarly, when one card gets extra work to do (ie the Physx calc), the SLi pair will slow down.
post #14 of 15
Get another 470 and slap a waterblock on it. They're cheap enough now that that's a reasonable option.
 
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post #15 of 15
Thread Starter 
With four 470's I think my PSU may choke. I think it should be fine with three and the 980. I'm leaning more towards the 450 option. It seems to be the most power for the price for what I want it to do. I have to go single slot or Water cool it. If I water cool I'm worried about the loop being a little too much for my pump and hurting flow. I considered the single slot galaxy 460 but I think the power draw and price is just pointless in my rig; at least for physics only.

I'm figuring that $150 for a physics card isn't that bad of an option.
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