nV News Forums

 
 

nV News Forums (http://www.nvnews.net/vbulletin/index.php)
-   NVIDIA GeForce 200 Series (http://www.nvnews.net/vbulletin/forumdisplay.php?f=60)
-   -   with two GTX 280 and a phyics card (http://www.nvnews.net/vbulletin/showthread.php?t=130444)

john19055 03-21-09 11:13 PM

with two GTX 280 and a phyics card
 
how does that work .could you use a cheaper card just to run the physics part of the game.with two GTX280 and a 9800 for the physics.would I see a benifit or it that just possible on certain motherboads.Can you even run two GTX 280 in SLI and have a single card to run just the physics .would I see a performance in games or is the two GTX 280 powerful enough to do it all.I guess the simple question I am trying to ask is it woth while to do this.

john19055 03-24-09 09:37 AM

Re: with two GTX 280 and a phyics card
 
If you have two GTX 280 running in SLI ,do you not need a phyics card.Or would a dedicated card help out,like a 9800gtx.Or would I not even see any help since I am running two GTX280 in SLI.

ChrisRay 03-24-09 09:18 PM

Re: with two GTX 280 and a phyics card
 
The way Nvidia drivers work with SLI and identical cards and PhysX is.

1) SLI Enabled + PhysX enabled

First GPU does PhysX Workload + Rendering workload. Second GPU does all Rendering workload.

2) SLI Disabled

First GPU does rendering workload, Second GPU does physics workload.


If you were to add a 9800GTX to the mix.

You'd now have the option to set its own seperate PhysX device. Keep in mind this cannot be done with 3 identical cards due to the limitation of the driver currently. You will need an card with a different deviceID/type.

3) SLI cards do full rendering workload and 9800GTX does PhysX.

john19055 03-26-09 08:32 AM

Re: with two GTX 280 and a phyics card
 
would putting a 9800GTX in there just for the physics be worth it ,like in the newer games.would I need a 512mb card or do I really need a 1gig card.would a 9800GT with 112 shaders and 512mb of memory be enough for the physics.what do you mean by the ID would a GTX 260 work.

john19055 03-28-09 03:20 AM

Re: with two GTX 280 and a phyics card
 
Is there anyone here running two GTX 260's or two GTX 280's in SLI with another card running just the phyics.and was it a big help in games that used it.

ChrisRay 03-28-09 10:31 AM

Re: with two GTX 280 and a phyics card
 
Using a 9800GTX as a PhysX card would depend greatly on the resolution your running. If you were doing 2560x1600 with 16xAA/16xAF and playing Mirrors edge. Having a 9800GTX + would benefit your performance a great deal. Physics processing does use GPU resources. So you need to consider your bottlenecks already.

john19055 03-28-09 09:53 PM

Re: with two GTX 280 and a phyics card
 
I would be running it off a overclock i7 920 and a Gigabyte EX58-UD5 with 6 gigs of DDR3 1600 memory.I want be running at 2560x1600 since I just have a Dell 24" monitor.

Anzial 04-02-09 09:17 PM

Re: with two GTX 280 and a phyics card
 
I think, in terms of physics 9800gtx doesn't offer much over 9800gt, there's just not that much load in physics only. 9600gt to 9800gt does yield some benefits, at least according to Firesquad

ChrisRay 04-03-09 01:11 AM

Re: with two GTX 280 and a phyics card
 
Quote:

Originally Posted by john19055 (Post 1970320)
I would be running it off a overclock i7 920 and a Gigabyte EX58-UD5 with 6 gigs of DDR3 1600 memory.I want be running at 2560x1600 since I just have a Dell 24" monitor.


At that resolution you probably would see a benefit in Mirrors edge using a 9800GTX as a physx card.

Sazar 04-03-09 10:55 AM

Re: with two GTX 280 and a phyics card
 
Quote:

Originally Posted by ChrisRay (Post 1974532)
At that resolution you probably would see a benefit in Mirrors edge using a 9800GTX as a physx card.

Ohi Chris

*wave*

john19055 04-09-09 09:13 PM

Re: with two GTX 280 and a phyics card
 
What is this Mirrors edge,a game.So a 9800 Gt would do just as good as a 9800GTX ,I am really looking for a single slot card.Plus do I need a 1gig card or would 512mb do just fine.

john19055 04-10-09 06:01 AM

Re: with two GTX 280 and a phyics card
 
I now there has to be someone useing two GTX 260,280 or the 285 in SLI and useing a 9800GT or 9600GT for dedicated physics.Does the drivers support running 2 GTX 280 and a dedicated card just for the physics.I have looked at some reviews but they are not much help ,but from what I have seen a 9600GT is just as good as a 9800GT.


All times are GMT -5. The time now is 02:00 PM.

Powered by vBulletin® Version 3.7.1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 1998 - 2014, nV News.