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Dedicated NVIDIA card for PhysX?

Forum Graphic & Displays : Graphics Cards - Dedicated NVIDIA card for PhysX?

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dannyaa   11-21-2008 at 02:17:15 AM

I have both an 8800gt and a GTX 260. If I put both of these into an SLI motherboard, but didn't run them in SLI mode or connect them, what I be able to use the 8800gt for PhysX and the GTX 260 for graphics?

I also have a spare 7800gt. But I don't think that card supports PhysX, does it?

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cjl   11-21-2008 at 02:24:58 AM
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You should be able to do that with the latest drivers.

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Nik_I   11-21-2008 at 02:30:22 AM
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the 7800GT won't support it. in order to use a card for Physx processing, it has to be at least a geforce 8 series. but technically you could buy an 8500GT and use it for physx if you wanted to.

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invisik   11-21-2008 at 02:32:04 AM
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you wont get much of a boost. in my case my 9600gso i used for physics actually bottlenecked my 2 gtx260 in sli in ut3. nvidia needs to polish physx drivers.

Message quoted 1 times
Message edited by invisik on 11-21-2008 at 02:32:25 AM
------------------------------ intel core 2 quad q6600 @3.2ghz msi p6n diamond (X-FI Extreme sound) 6gig of OCZ+CoRSAIR oc 900mhz Nvidia gtx 260 sli @ 730/1465/1250
Lite-On Blue-ray Western Digital 7200rpm 500gb Antec 500 Earthwatt Window vista 64-bit
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dannyaa   11-21-2008 at 03:22:05 AM
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Hmm, interesting. Can I still run PhysX with just a single GTX 260? Will it still run well?

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invisik   11-21-2008 at 01:00:08 PM
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ya it should run fine. give the 8800gt a shot and see if it improves your fps. in my case 1 gtx260 rendered while the other did physics so no need for a 3rd in my case. you could benefit because you only have 1 gtx260, just experiment.

------------------------------ intel core 2 quad q6600 @3.2ghz msi p6n diamond (X-FI Extreme sound) 6gig of OCZ+CoRSAIR oc 900mhz Nvidia gtx 260 sli @ 730/1465/1250
Lite-On Blue-ray Western Digital 7200rpm 500gb Antec 500 Earthwatt Window vista 64-bit
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Stupido   11-21-2008 at 05:48:12 PM
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Sorry for the stupid question, but I'm stupido... :)

do I need SLI mobo to run 1 gpu for graphics and the other for physix?
I guess I do need SLI, but it never hurts to ask... ;)

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dagger   11-22-2008 at 12:03:43 AM
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invisik wrote :

you wont get much of a boost. in my case my 9600gso i used for physics actually bottlenecked my 2 gtx260 in sli in ut3. nvidia needs to polish physx drivers.



Actually, Sli + discrete physics still isn't supported by driver. You have the physx option, but doesn't let you choose which gpu to run it on, as in single card plus another for physx. In other words, the "bottlenecking" is actually due to the PC trying to run physx off your gtx260. :p

Single card plus another for physx will always work.

Message quoted 1 times
Message edited by dagger on 11-22-2008 at 12:04:27 AM
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cjl   11-22-2008 at 12:16:15 AM
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dagger wrote :

Actually, Sli + discrete physics still isn't supported by driver. You have the physx option, but doesn't let you choose which gpu to run it on, as in single card plus another for physx. In other words, the "bottlenecking" is actually due to the PC trying to run physx off your gtx260. :p

Single card plus another for physx will always work.


See here

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invisik   11-22-2008 at 12:20:02 AM
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yes i believe it is supported. im able to go on the control panel enable sli and it gives me the option to dedicate 9600gso for physx.
=]

------------------------------ intel core 2 quad q6600 @3.2ghz msi p6n diamond (X-FI Extreme sound) 6gig of OCZ+CoRSAIR oc 900mhz Nvidia gtx 260 sli @ 730/1465/1250
Lite-On Blue-ray Western Digital 7200rpm 500gb Antec 500 Earthwatt Window vista 64-bit
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dagger   11-22-2008 at 12:41:14 AM
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How come it didn't work on my 9800gx2? I suck... :cry:

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Stupido   11-22-2008 at 11:59:38 PM
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First of all, except UT3 are any other games that support PhysiX?

Currently I'm using one GTX280 but also have 8800 GTS 512 laying around...
So I was wondering if it is good idea to go with i920/X58 mobo and later just add extra GTX280 in SLI to keep up? Or simply swap 8800 GTS with 280 and buy the "the-big-of-today" card?

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Silver Graphics badge TheGreatGrapeApe   11-23-2008 at 07:24:36 PM
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Yeah, it's a small list, but there are some, even big titles like GRAW/GRAW2 and AoE3:WarChiefs, but the list is small, but growing (how fast has yet to be seen).

The list isn't as long as all the PhysX titles because there's no division between CPU and GPU physics in most lists, and they are not the same just like Havok based games =/= Havok GPU physics. That's also part of the problem with talking about future titles because many people talk about a game having PhysX and then it turns out to be CPU only.

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