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21-12-10, 05:11 AM
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Newbie
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Join Date: Dec 2010
Location: Florida, USA
Posts: 10
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i have an AMD processor and am wanting to get Nvidia graphics cards (particularly the 570) and have often heard that in order to get the full performance out of physx you need a dedicated physx card. first off is this true? and second if it is worth spending another 350 bucks for on another card, does the dedicated physx card have to be in SLI with the primary card (which would of course mean that t would be incompatible with my computer) or could they just be two completely independent cards on one motherboard
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21-12-10, 05:18 AM
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OC3D Crew
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Join Date: Nov 2010
Posts: 734
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No a dedicated physx card doesn't have to be in SLI with your other card. However if you buy a 570 I wouldn't say that you need a dedicated physx card. Especially not a 570 as a physx card. The single 570 will be more than capable of doing that aswell.
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23-12-10, 08:55 AM
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OC3D Elite
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Join Date: Dec 2010
Location: England
Posts: 1,218
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Hello,
Having a second card dedicated to PhysX obviously improves the performance. Mafia 2 runs well with maxed-out settings with a GTX 480 and a GTS 250 for PhysX. 480 on its own doing the PhysX too struggles and the 570 will too, probably. Lowering the settings to minimum may improve the result though the 480 struggled to process the Mafia 2 PhysX at it's minimum setting wich is medium. If the GPU struggles to process the PhysX everything else is throttled, restricted, because it is a bottleneck effect. In some senarios the GTX 570 performs closely to the GTX 480 and I don't believe it can give a satisfactory result for Mafia 2 maxed-out, on it's own.
The GTX 460 is a pokey card and is about 10 quid more for a cheap one compared to an average new GTS 250. That'll do. More is more
Thanks  
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23-12-10, 10:17 AM
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OC3D Crew
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Join Date: Nov 2010
Posts: 734
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Quote:
Originally Posted by Jerome
Hello,
Having a second card dedicated to PhysX obviously improves the performance. Mafia 2 runs well with maxed-out settings with a GTX 480 and a GTS 250 for PhysX. 480 on its own doing the PhysX too struggles and the 570 will too, probably. Lowering the settings to minimum may improve the result though the 480 struggled to process the Mafia 2 PhysX at it's minimum setting wich is medium. If the GPU struggles to process the PhysX everything else is throttled, restricted, because it is a bottleneck effect. In some senarios the GTX 570 performs closely to the GTX 480 and I don't believe it can give a satisfactory result for Mafia 2 maxed-out, on it's own.
The GTX 460 is a pokey card and is about 10 quid more for a cheap one compared to an average new GTS 250. That'll do. More is more
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The point that I was trying to make was that he will see a greater improvement in overall gameplay if he is running those 2 570s in SLI rather than running one only for Physx. I do agree that something like a 460 is more appropriate for Physx and will give better results than a SINGLE 570, but with two 570 in SLI it won't.
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23-12-10, 01:35 PM
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Join Date: Dec 2010
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TBH, generally anything over 60fps you won't noticed. Having a dedicated physX card will see an improvement over 2 570s in sli configuration. But are you really worried about not getting 100fps.
In games where you get under 60 then i would look into getting a physx card. otherwise its a waste and i wouldn't do it. Having the extra heat, noise and power cosumtion isn't worth the extra couple fps you won't noticed
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23-12-10, 01:46 PM
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Moderator
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Join Date: Jul 2010
Location: Michigan
Posts: 3,175
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Quote:
Originally Posted by Tony
TBH, generally anything over 60fps you won't noticed. Having a dedicated physX card will see an improvement over 2 570s in sli configuration. But are you really worried about not getting 100fps.
In games where you get under 60 then i would look into getting a physx card. otherwise its a waste and i wouldn't do it. Having the extra heat, noise and power cosumtion isn't worth the extra couple fps you won't noticed
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2 570's in SLI are plenty for PhysX and graphics. A dedicated card will do nothing unless you are running extreme resolutions across multiple monitors.
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23-12-10, 03:44 PM
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OC3D Crew
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Join Date: Sep 2010
Posts: 725
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If you're thinking of 570 sli get a 580 and a 768 460 as a dedicated PhysX. Put the 460 on top, put the fan to 49% and get it folding when you're not using it for PhysX and clock the living freak out of both of them.
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Originally Posted by name='tinytomlogan' timestamp='1292443446' post='372162'
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23-12-10, 04:54 PM
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Newbie
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Join Date: Dec 2010
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Quote:
Originally Posted by hmmblah
2 570's in SLI are plenty for PhysX and graphics. A dedicated card will do nothing unless you are running extreme resolutions across multiple monitors.
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I understand but OP said full performance. Meaning one of the 570 would be have to be a dedicated physX
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23-12-10, 05:00 PM
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Moderator
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Join Date: Jul 2010
Location: Michigan
Posts: 3,175
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Quote:
Originally Posted by Tony
I understand but OP said full performance. Meaning one of the 570 would be have to be a dedicated physX
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No it wouldn't. You wouldn't gain anything by setting one of the 570s to dedicated PhysX. There is enough horsepower there with the two 570s in SLI to do both the graphics and the PhysX. Unless, like I said, you were running some insane resolutions.
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