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post #41 of 269
Are you going to add the Fermi cards and answer the ever present question of... "If I have 2 Gtx 4xx, do I need another card for Physx?" I know you've been busy but aren't finals over by now?
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post #42 of 269
Quote:
Originally Posted by BriSleep View Post
Are you going to add the Fermi cards and answer the ever present question of... "If I have 2 Gtx 4xx, do I need another card for Physx?" I know you've been busy but aren't finals over by now?
i think the GTX 400 series support PHYSx already so no you dont. but i think you can have a dedicated card if you wish. that is, if you have enough PCI-E x16 slots
    
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post #43 of 269
I have a spare 8400 lying around, wonder if it would degrade physx performance or boost it with the gtx480.
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post #44 of 269
Quote:
Originally Posted by clerick View Post
I have a spare 8400 lying around, wonder if it would degrade physx performance or boost it with the gtx480.
You would be better off using the GTX 480 alone. I'm not entirely sure all cards can do PhysX. I have a 8400 GS as well and it cannot do PhysX - not enough video memory to support CUDA.
post #45 of 269
Ah, thanks.
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post #46 of 269
I have a EVGA480 SC card and i have a spare 9800gx2 and a spare 9800gtx+.

Would it be wire to add the 9800GX2 card for PhysX?

Also, do i just pop the second card in the PCI-e slot or is there more of a set up involved to get it to work?
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post #47 of 269
Just to keep this up to date, I have since done a lot of research and testing. I have 2 Vanilla Evga Gtx 480's, have tested them all kinds of combinations and borrowed my neighbors Gts 250. One 480 by itself will run a game and the Physx processing just fine on it's own, you get about a 7% drop in fps in Batman AA and Cryostasis when you run Physx>>Gpu. However, with the new 257 drivers, if you have a 4+ core cpu, you can set it to Physx>>Cpu, no drop in fps at all.

When in Sli with the 2 480's and the Physx set to automatic it doesn't seem to affect them at all. If you add the Gtx 250, not in Sli but have the drivers dedicate Physx to it, it will bring down the fps by 9-11%. If you have the Physx run on the second 480 in an x16 slot it only dropped the fps about 3%, more in Cryostasis than in Batman, perhaps it's something to do with DX11?? When you set the 2 480's to Sli and put Physx off on the Cpu, there is no difference than when set to automatic.

I haven't run them with the Physx indicator on yet to see where it's being handled so don't ask, I don't know. I got delayed by one DOA card and one defective card, I had to start all over. I will know in a week or 2.

For you Nvidia fanboys, one Gtx 480, in most benchmarks and games will beat out a 5870 with 100Mhz overclock by 30 to 36.7%. So the ATI fanboys that tell you the $100- extra you pay for a 480 isn't worth it. If you pay $400- for a base 5870 and $500- for a base 480, then you've paid 8% more for an 18% performance gain. I think it's worth it.
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post #48 of 269
My Asus GTS 250 apparently doesnt have physx. GPUZ shows it not having it. Is this an error or is it not enabled?
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post #49 of 269
Thread Starter 
Quote:
Originally Posted by Awk34 View Post
My Asus GTS 250 apparently doesnt have physx. GPUZ shows it not having it. Is this an error or is it not enabled?
You have to enable it in the nVidia Control Panel.
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post #50 of 269
Quote:
Originally Posted by metallicamaster3 View Post
You have to enable it in the nVidia Control Panel.
OMG thanks dude. In the control panel it was on auto-select and I guess it was going to the CPU instead of GPU, so i manually set it to GPU. Thanks!
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