Go Back   Overclock3D Forums > [OC3D] Graphics & Displays > Graphics Cards
Reply
 
Thread Tools Display Modes
 
  #1  
Old 21-12-10, 05:11 AM
johntmssf johntmssf is offline
Newbie
 
Join Date: Dec 2010
Location: Florida, USA
Posts: 10
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

Reply With Quote
  #2  
Old 21-12-10, 05:18 AM
Aurus_OC Aurus_OC is offline
OC3D Crew
 
Join Date: Nov 2010
Posts: 734
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.
__________________
Reply With Quote
  #3  
Old 23-12-10, 08:55 AM
JezEngland JezEngland is offline
OC3D Elite
 
Join Date: Dec 2010
Location: England
Posts: 1,233
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
__________________
Reply With Quote
  #4  
Old 23-12-10, 10:17 AM
Aurus_OC Aurus_OC is offline
OC3D Crew
 
Join Date: Nov 2010
Posts: 734
Quote:
Originally Posted by Jerome View Post

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
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.
__________________
Reply With Quote
  #5  
Old 23-12-10, 01:35 PM
Tony Tony is offline
Newbie
 
Join Date: Dec 2010
Posts: 37
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
Reply With Quote
  #6  
Old 23-12-10, 01:46 PM
hmmblah's Avatar
hmmblah hmmblah is offline
Moderator
 
Join Date: Jul 2010
Location: Michigan
Posts: 3,618
Quote:
Originally Posted by Tony View Post

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
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.
__________________
i7 930 | GA-X58A-UD3R | GTX680 | 6GB DDR3 | 250GB 840 Pro SSD



3DMark11 - P10045 | X3680
Reply With Quote
  #7  
Old 23-12-10, 03:44 PM
TMaksimov TMaksimov is offline
OC3D Crew
 
Join Date: Sep 2010
Posts: 737
Send a message via MSN to TMaksimov
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.
__________________
Quote:
Originally Posted by name='tinytomlogan' timestamp='1292443446' post='372162'

"see here - watch - follow - achieve & stfu"


Reply With Quote
  #8  
Old 23-12-10, 04:54 PM
Tony Tony is offline
Newbie
 
Join Date: Dec 2010
Posts: 37
Quote:
Originally Posted by hmmblah View Post

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.
I understand but OP said full performance. Meaning one of the 570 would be have to be a dedicated physX
Reply With Quote
  #9  
Old 23-12-10, 05:00 PM
hmmblah's Avatar
hmmblah hmmblah is offline
Moderator
 
Join Date: Jul 2010
Location: Michigan
Posts: 3,618
Quote:
Originally Posted by Tony View Post

I understand but OP said full performance. Meaning one of the 570 would be have to be a dedicated physX
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.
__________________
i7 930 | GA-X58A-UD3R | GTX680 | 6GB DDR3 | 250GB 840 Pro SSD



3DMark11 - P10045 | X3680
Reply With Quote
  #10  
Old 23-12-10, 06:49 PM
Tony Tony is offline
Newbie
 
Join Date: Dec 2010
Posts: 37
Hmm

http://www.bit-tech.net/hardware/gra...-performance/2

test 460 with 275 as physX

remembered that mafia II does physx on the CPU if your in sli. So Hmmblah is right
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump






All times are GMT. The time now is 01:43 AM.
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.