originally posted by CorvetteZ06C5 -- 4/28/2009 1:18:58 PM >

 
To use PhysX GPU acceleration with multi-GPU mode

1.      From the NVIDIA Control Panel navigation tree pane, under 3D Settings, select Set Multi-GPU and PhysX configuration to open the associated page.

2.      Enable PhysX GPU acceleration. 

• If your computer has only one PhysX -capable GPU, then under Set PhysX GPU acceleration click the Enabled radio button.
• If your computer has more than one PhysX -capable GPU, then under Set PhysX GPU acceleration click the Enabled on radio button and then click the list arrow and select the GPU you want to use for PhysX acceleration.  

3.      Enable multi-GPU mode.

Under Select the mult-GPU configuration, click Enable multi-GPU mode.

4.      If you have more than one display connected, 

(Windows XP or pre-GeForce 8 series GPUs)

Under Select the display to view Multi-GPU rendered content on, click the list arrow and select the display that you want to use to view your game.

The GPU connected to this display will function as the "primary" GPU, all others will function as slaves to the primary GPU.

(Windows Vista and GeForce 8 or later series GPUs)

Under Select the multi-GPU focus display, click the list arrow and select the display to which you want to apply full multi-GPU acceleration for full-screen applications.

5.      Click Apply.  

---

To use PhysX GPU acceleration with SLI technology

1.      From the NVIDIA Control Panel navigation tree pane, under 3D Settings, select Set SLI and PhysX configuration to open the associated page.

2.      Enable PhysX GPU acceleration.

• If your computer has only one PhysX-capable GPU, then under Set PhysX GPU acceleration click the Enabled radio button.

• If your computer has more than one PhysX-capable GPU, then under Set PhysX GPU acceleration click the Enabled on radio button and then click the list arrow and select the GPU you want to use for PhysX-acceleration. 

3.      Enable SLI mode.

• Under Select the SLI configuration, click Enable SLI.
• Systems with three NVIDIA SLI-ready GPUs in an SLI PC are indicated by the text Enable 3-way SLI.
• Systems with four NVIDIA SLI-ready GPUs in an SLI PC are indicated by the text Enable Quad SLI technology.

4.      If you have more than one display connected,  

(Windows XP or pre-GeForce 8 series GPUs)

• Under Select the display to view SLI rendered content on, click the list arrow and select the display that you want to use to view your game.
• The GPU connected to this display will function as the "primary" GPU, all others will function as slaves to the primary GPU. 

(Windows Vista and GeForce 8 or later series GPUs)

• Under Select the SLI focus display, click the list arrow and select the display to which you want to apply full SLI acceleration for full-screen applications.

5.      Click Apply.  

lastsamurairick

Hmm< I will try since i have a N-vidia gpu laying around for a year now is a N-vidia Ge-Force 8600 GT 1GB for Phys X see how it goes thankX's a bunch.Peace out

Hi all!
I've just visited this forum. Happy to get acquainted with you. Thanks.

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I can't get 4 cuda processors to be detected with SLI off, with SLI on four do but the work units are invalid plus nvidia driver restarts. 

be warned that nvidia's current policy is NOT to support Multiple Cuda Processors for desktop GPU's

see this thread for more info

Archangelboy

Running dual 295s, am I effectively using 3 GPUs for SLI and one for PhysX, or how is the workload being distributed?

In SLI, PhysX runs on GPU 1 and the rendering is done across all 4 GPU's. This is why using dedicated PhysX card of similar power say a GTX 260 in your case, will give you better results in games using GPU PhysX. Batman AA is a good example.

Here's a couple of sources...

http://forums.nvidia.com/...owtopic=150597&hl=

http://forums.nvidia.com/...hp?showtopic=148581%29

I am looking to buy 3 GTX 285 Classifieds and a GTX 295 CO-OP Superclocked GPU. If I install them on my X58 4 SLI Classified board, and assign the PhysX to the 295 CO OP, will it bog down my three SLI'd 285 Classifieds? Im new to this, this is my first PC project.
Also does the X58 Classified MB have any way to install the Xeno gaming network card, and is there anyway to put a PCI 2.2 PPU on it

The system that I am building is:
Coolermaster HAF 932
EVGA X58 4 Way SLI Classified Board w/ N/S bridge and CPU waterblock
Intel core I7 960 3.20 GHz
B 7200 RPM HDD and 750 GB 7200 RPM HDD
ed Cards and 1 GTX 295 CO-OP Superclocked Card w/ Waterblock
Koolance KIT-1000BK Water Cooler Kit
Win 7 Ultimate

I have purchased a GTX275 CO-OP PhysX card and was wondering what card  can i sli it with if any? I am new to this and very tired of looking at specs. Cards are getting harder to find and i would like to buy a nother one.

Hi all
I may not have something set up right and would like some help/advice.

I have a GTX275 as primary, and a GTS260 as PhysX card. From what I've read, I'm supposed to go to the control panel and:

To run NVIDIA Multi-GPU connected to a single display Note: To use this procedure, your system must have two or more NVIDIA GPUs connected to a single display.

From the NVIDIA Control Panel navigation tree pane, under 3D Settings, select Set Multi-GPU configuration to open the associated page.
Click Enable multi-GPU mode.
Click Apply.

I don't see the "Select Multi-GPU Configuration" option. I only see "Set PhysX Configuration", in which I can choose to enable PhysX on either/both cards. I don't see any reference to any "Multi-GPU" settings at all in the menu tree.

This is the first time I've had 2 GPU's in my computer, never having used SLI. I know what I'm doing isn't SLI, but is there something special I should be doing in regards to driver installation when 2 GPU's are in the computer?

My monitor is connected to the 275. I did NOT use the bridge cable/connector connecting the 2 cards. I thought that was just for SLI. Should it be installed?

Using 196.21 driver.

Thanks Talonman.
Maybe I don't have a problem.

But just to make sure I'm explaining it right and I understand you:

My menu tree on the left does NOT say "Set multi-GPU and PhysX configuration"
It ONLY says "Set PhysX configuration".
This is because my two cards are NOT the same GPU.

Under "Set PhysX configuration", I ONLY have option 1, in which I have " Enabled on: GeForce GTS 260" chosen.
Option 2 "Select the multi-GPU configuration" is NOT shown.
This is because my two cards are NOT the same GPU.

Option 3 "Select the multi-GPU focus display" is NOT shown. I would assume this option is not shown because I only have 1 display.

So in my setup, the driver automatically sets "multi-GPU mode" to enabled, and doesn't give me an option for enable/disable.

Am I understanding you right?

Similar issues.
275GtX in top slot, 8800gt in x4 slot.
I only have the option to completely disable, or enable on.... I disabled, applied, then enabled on 880gt, applied. however I get the impression that it is enabling on both. I dont know how to check to be certain.
I run two displays, both pplugged into the 275. I have no option to select "focus display".
Nowhere am I seeing an option for mult-gpu anything.
Stats are in siggy. (plus the 8800gt)

Is there a way to verify physx is on the 8800 and not the 275. Am I missing something somewhere?

EDIT: Precision 1.9.1 is showing 0% usage on GPU2 in desktop, Modern Warfare 2, and Call of Pripyat.
Ive tried enabling on 8800gt, the 275, and both. Identical results.
Think I need some help...

The best benchmark I've found for testing PhysX is to fork over 10 bucks to Futuremark and get 3DMark Vantage. The #2 CPU test will test your system for PhysX. Use your Nvidia Control Panel to set up your PhysX configuration. With PhysX disabled Vantage will use your CPU for the PhysX test...etc...etc.

My Test Results For The #2 CPU Test:

PhysX Disabled.......18.8 Operations/s
8600GT Enabled.....55.82      "     "
GTX 260 Enabled....154.21    "     " 

It would be fun to see others post their results here...

Hey I havent seen this asked and I doubt it makes any difference,but do you gain anything if you overclock your physics card?

konidk

im running 2 gtx 285s in sli and a gtx 260 for physx(overkill, but it was laying around doing nothing anyway), vantage will crash when it gets to the 2nd cpu test, Darkvoid only will run lowest physyx setting, the message basically saying i need a 9800 gt or better....i used driver sweeper and reinstalled the newest drivers, so kind of lost as to what the issue is.
 
edit: no crash this time when i ran just the cpu2 test, but only 29 op/s?

You might need to apply the 3DMark vantage hotfix if you haven't done so already.  27-29 op/s what I'm getting with a GTX260 for PhysX.

I'm in big trouble there :/ Gat a GTX275 Lightning and wanna go SLI with PhysX, but new owner of the EVGA GTX275 Co Op, I was expecting to get only 2 card for 3 GPUs...

But on 3 OS and with 2 last Forceware I can't activate SLI mod, the 2nd 275 immediately runs for PhysX leaving the GTS250 to do nothing :(

Is it becuse of a different amound of GDR3 on both card or what ? I have to mention that I tried on a P55 FTW (E657) board... thx

EeKy NoX

I'm in big trouble there :/ Gat a GTX275 Lightning and wanna go SLI with PhysX, but new owner of the EVGA GTX275 Co Op, I was expecting to get only 2 card for 3 GPUs...

But on 3 OS and with 2 last Forceware I can't activate SLI mod, the 2nd 275 immediately runs for PhysX leaving the GTS250 to do nothing :(

Is it becuse of a different amound of GDR3 on both card or what ? I have to mention that I tried on a P55 FTW (E657) board... thx

GTX275 Lightning

EVGA has stated the 1792MB and the 896MB cards will not SLI together

thanks for the sli fix!