Nvidia Multi GPU SLI/PhysX Setup Guide.
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[b]Welcome[/b]: With the vast amount of SLI configurations and PhysX Setups available. It can be a little confusing on how to setup your system and peak it for optimal performance. This is a general guide to understanding how Nvidia Multi GPU and PhysX processing works. This guide will be divided into 3 Parts.

[b]1) SLI Setup And Installation for 2way/3way/Quad SLI[/b]

[b]2) SLI Profiling System And AFR explanations [/b]

[b]3) PhysX Processing in Multi GPU Enviroment And Setup [/b]



[size=3][b] Setting up for 2 Way SLI [/b][/size]


[img]http://chrisray.soterial.com/multigpuguide/2waysliexample.png[/img]


[b]What you'll need[/b]: You will first need a motherboard that supports SLI. For a list of SLI Supported motherboard please visit [url="http://www.slizone.com/object/slizone_build_mobo.html"]Nvidia Certified motherboard List[/url] . You'll also need a pair of identical graphic cards. Such as two 9800GTX or 2 GTX 285 cards. You cannot mix a GTX 285 with a GTX 260. The cards must have the same device ID however they can be running at different clock speeds.

[b]Note[/b]: There are a few exceptions to the rule. Such as the GTX 260 216 and GTX 260 196. Or a 9800GTX + and a 9800GTX or GTS 250. Since they are all essentially the same hardware. But for the most part the guidelines above apply. Also if you're running a pair of mismatched cards in clock frequency. Always put the fastest in the primary slot. This allows for faster CUDA/PhysX accelleration in a standard multi GPU setup.

[img]http://chrisray.soterial.com/multigpuguide/bridgeexample1.png[/img]


[b] SLI bridge[/b]: While an SLI bridge is not required. You do need one for optimal performance. Not using one can result in lesser performance from 30% and up. SLI bridges vary greatly. Some are flexible. Some are harder and PCB like. You should recieve an SLI bridge with your motherboard. But you can also order flexible SLI bridges online. You may use a 2 way SLI bridge or 3 way SLI bridge. It does not matter in this case.

[b] Power Supply[/b]: Power Supplies can be a little tricky. There are vast number of power supplies on the market available. Which widely range in quality and stability. Nvidia provides a general guide for SLI certified power supplies.
[url="http://www.slizone.com/object/slizone_build_psu.html"]SLI Certified Power Supplies[/url]


[size=3][b] Quad SLI and 3 Way SLI Setup Guide[/b][/size]


[img]http://chrisray.soterial.com/multigpuguide/3wayexample.jpg[/img] [img]http://chrisray.soterial.com/multigpuguide/quadexample.png[/img]

.

[b]What you'll need[/b]: 3 Way SLI Compatible Motherboard, 3 Way SLI Bridge, 1K SLI approved PSU.

[b]Note[/b]: Quad SLI with dual GPU cards can use standard SLI motherboards.

[b]Motherboard Support[/b]: 3 Way SLI requires specific technology to function.The motherboard must support at least three 8x capable PCIE slots and be approved for SLI by Nvidia. You will need to verify with your motherboard manufacturer or use Nvidia's website to ensure the motherboard is 3 way SLI Capable. Nforce 790I, 780I, 680I, and 780A are all 3 way capable Nforce chipsets. The X58 and P55 chipset with an nforce 200 chip will also support 3 Way SLI.
[url="http://www.asus.com/product.aspx?P_ID=n0goz6KAhlPOk1kF"]3 Way SLI compatible P55 Example[/url]
[url="http://www.slizone.com/object/slizone_build_mobo.html"]Certified SLI motherboards[/url]

[b]Power[/b]: 3 Way SLI and Quad SLI have significantly higher power requirements than most dual SLI Setup. As a general guide you should aim for 1 Kilowatt and higher on the PSU. Nvidia has an SLI approved PSU guide at slizone.
[url="http://www.slizone.com/object/slizone_build_psu.html"]Nvidia Approved SLI PSUs[/url]

[b]3 Way SLI Cooling[/b]: 3 Way SLI puts out alot of heat. To ensure optimal cooling extra measures for cooling are suggested. Below is an example of an optimal way to configure your side vent cooling for 3Way SLI.

[url="http://chrisray.soterial.com/multigpuguide/3waycool1.jpg"][img]http://chrisray.soterial.com/multigpuguide/3waycool1thumb.jpg[/img][/url] [url="http://chrisray.soterial.com/multigpuguide/3waycool2.jpg"][img]http://chrisray.soterial.com/multigpuguide/3waycool2thumb.jpg[/img] [/url]

[b]Bridge Chip[/b]: Quad SLI can use a standard bridge chip since the bridge is built onto all dual GPU solutions made by Nvidia. However 3 Way SLI systems must use a 3 Way SLI supported bridge. Unlike SLI which can run at reduced performance 3Way SLI requires a bridge chip.

[img]http://chrisray.soterial.com/multigpuguide/bridgeexample2.png[/img]
Welcome: With the vast amount of SLI configurations and PhysX Setups available. It can be a little confusing on how to setup your system and peak it for optimal performance. This is a general guide to understanding how Nvidia Multi GPU and PhysX processing works. This guide will be divided into 3 Parts.



1) SLI Setup And Installation for 2way/3way/Quad SLI



2) SLI Profiling System And AFR explanations



3) PhysX Processing in Multi GPU Enviroment And Setup







Setting up for 2 Way SLI





Image





What you'll need: You will first need a motherboard that supports SLI. For a list of SLI Supported motherboard please visit Nvidia Certified motherboard List . You'll also need a pair of identical graphic cards. Such as two 9800GTX or 2 GTX 285 cards. You cannot mix a GTX 285 with a GTX 260. The cards must have the same device ID however they can be running at different clock speeds.



Note: There are a few exceptions to the rule. Such as the GTX 260 216 and GTX 260 196. Or a 9800GTX + and a 9800GTX or GTS 250. Since they are all essentially the same hardware. But for the most part the guidelines above apply. Also if you're running a pair of mismatched cards in clock frequency. Always put the fastest in the primary slot. This allows for faster CUDA/PhysX accelleration in a standard multi GPU setup.



Image





SLI bridge: While an SLI bridge is not required. You do need one for optimal performance. Not using one can result in lesser performance from 30% and up. SLI bridges vary greatly. Some are flexible. Some are harder and PCB like. You should recieve an SLI bridge with your motherboard. But you can also order flexible SLI bridges online. You may use a 2 way SLI bridge or 3 way SLI bridge. It does not matter in this case.



Power Supply: Power Supplies can be a little tricky. There are vast number of power supplies on the market available. Which widely range in quality and stability. Nvidia provides a general guide for SLI certified power supplies.

SLI Certified Power Supplies





Quad SLI and 3 Way SLI Setup Guide





Image Image



.



What you'll need: 3 Way SLI Compatible Motherboard, 3 Way SLI Bridge, 1K SLI approved PSU.



Note: Quad SLI with dual GPU cards can use standard SLI motherboards.



Motherboard Support: 3 Way SLI requires specific technology to function.The motherboard must support at least three 8x capable PCIE slots and be approved for SLI by Nvidia. You will need to verify with your motherboard manufacturer or use Nvidia's website to ensure the motherboard is 3 way SLI Capable. Nforce 790I, 780I, 680I, and 780A are all 3 way capable Nforce chipsets. The X58 and P55 chipset with an nforce 200 chip will also support 3 Way SLI.

3 Way SLI compatible P55 Example

Certified SLI motherboards



Power: 3 Way SLI and Quad SLI have significantly higher power requirements than most dual SLI Setup. As a general guide you should aim for 1 Kilowatt and higher on the PSU. Nvidia has an SLI approved PSU guide at slizone.

Nvidia Approved SLI PSUs



3 Way SLI Cooling: 3 Way SLI puts out alot of heat. To ensure optimal cooling extra measures for cooling are suggested. Below is an example of an optimal way to configure your side vent cooling for 3Way SLI.



Image Image



Bridge Chip: Quad SLI can use a standard bridge chip since the bridge is built onto all dual GPU solutions made by Nvidia. However 3 Way SLI systems must use a 3 Way SLI supported bridge. Unlike SLI which can run at reduced performance 3Way SLI requires a bridge chip.



Image

#1
Posted 11/11/2009 08:33 PM   
[size=3][b] Software Installation and Setup[/b][/size]


[img]http://chrisray.soterial.com/multigpuguide/driver1.jpg[/img]

[b]Driver Install[/b]: Once you have installed the needed hardware. You will need to install the drivers. Download the latest drivers from [url="http://www.nvidia.com/Download/index.aspx?lang=en-us"]Nvidia driver download section[/url] and install as you would normally. The installation will take longer than that of a single GPU. The More GPUS installed the longer it will take. This is because the driver has to setup and assign a driver for each device. Be patient as it goes through this process and restart the computer when asked.

[img]http://chrisray.soterial.com/multigpuguide/setsli.png[/img] [img]http://chrisray.soterial.com/multigpuguide/setsli2.png[/img]

[b]Enabling SLI[/b]: From here you go to the Nvidia Control Panel and look for "Set SLI and PhysX Configuration". Click Enable SLI.

[b]Note[/b]: Quad SLI: 3 Way SLI: and SLI will appear dependent on the SLI Configuration.


[b] Missing SLI option[/b]: If in the event the SLI button does not appear. There are few likely culprits. One of the biggest ones is that not all GPUS are being properly detected. You will need to verify that all GPUS are in fact installed and detectable by drivers. There are a few ways of doing this. From the Nvidia control panel and device manager. Below are examples of how to check on this.

[b]Note:[/b] Another possible scenario is your motherboard does not support SLI or your motherboard needs a BIOS update. Contact your motherboard vendor for more information.

[img]http://chrisray.soterial.com/multigpuguide/devicemanager.png[/img] [url="http://chrisray.soterial.com/multigpuguide/systemgpus.png"][img]http://chrisray.soterial.com/multigpuguide/systemgpusthumb.png[/img][/url]

[size=3]
[b]SLI Rendering Modes[/b][/size]

[b]Introduction[/b]: SLI uses alternate frame rendering (AFR) to provide speed ups in multi GPU systems. This AFR system is also a key part of Nvidia [b]Nway[/b] profiling system. Here I'll be explaining how the AFR modes interact with the end user and profiling system.

[b]Forcing AFR[/b]: The Nvidia driver will let you "force" AFR in any application which does not have native profile support. You will need to find the "SLI Rendering" option in the 3D Settings menu to set this up. These settings will "not" overwrite any game that already has an SLI profile.

[url="http://chrisray.soterial.com/multigpuguide/forceafr.png"][img]http://chrisray.soterial.com/multigpuguide/forceafrthumb.png[/img][/url]


[b]Single GPU[/b]: Only one GPU will be used
[b]2 GPU AFR[/b]: 2 GPUS will be used in AFR. Default mode for SLI users.
[b]3 GPU AFR[/b]: 3 GPUS will be used in AFR. Default mode for 3 Way SLI.
[b]4 GPU AFR[/b]: 4 GPUS will be used in AFR. Default mode for Quad SLI

[b]Note[/b]: 3 Way will only be available to 3 Way and Quad users. And 4 Way will only be available to Quad SLI users.

[size=3][b] Driver Profiling and Nway[/b][/size]

[b]Profiles[/b]: Nvidia has integrated a application based profile system into their drivers. These driver profiles allow the drivers to tune optimal performance and compatibility on an application specific basic. Profiles updates are provided regularly with new sets of drivers and are commonly released before a new game reaches the market. If your game does not have a profile. You will have to force the driver settings mentioned above or create your own profile.

[url="http://chrisray.soterial.com/multigpuguide/profilelist.png"][img]http://chrisray.soterial.com/multigpuguide/profilelistthumb.png[/img][/url]

[b]Nway[/b]: Nway is Nvidia's AFR detection system. It works on a pretty simple premise. Nvidia has a profile setup which will enable "Maximum" AFR for how many GPUS present. If a profile is enabled with Nway then it will scale AFR to the maximum amount of GPUS present in the system. Two GPUS will get 2Way AFR and three GPUS will get 3way AFR and four GPUS will get 4way AFR. Most profiles now use Nway. But some older titles will be an exception. Nway should help get the maximum scaling from your GPUS with minimal additional driver support.
Software Installation and Setup





Image



Driver Install: Once you have installed the needed hardware. You will need to install the drivers. Download the latest drivers from Nvidia driver download section and install as you would normally. The installation will take longer than that of a single GPU. The More GPUS installed the longer it will take. This is because the driver has to setup and assign a driver for each device. Be patient as it goes through this process and restart the computer when asked.



Image Image



Enabling SLI: From here you go to the Nvidia Control Panel and look for "Set SLI and PhysX Configuration". Click Enable SLI.



Note: Quad SLI: 3 Way SLI: and SLI will appear dependent on the SLI Configuration.





Missing SLI option: If in the event the SLI button does not appear. There are few likely culprits. One of the biggest ones is that not all GPUS are being properly detected. You will need to verify that all GPUS are in fact installed and detectable by drivers. There are a few ways of doing this. From the Nvidia control panel and device manager. Below are examples of how to check on this.



Note: Another possible scenario is your motherboard does not support SLI or your motherboard needs a BIOS update. Contact your motherboard vendor for more information.



Image Image





SLI Rendering Modes



Introduction: SLI uses alternate frame rendering (AFR) to provide speed ups in multi GPU systems. This AFR system is also a key part of Nvidia Nway profiling system. Here I'll be explaining how the AFR modes interact with the end user and profiling system.



Forcing AFR: The Nvidia driver will let you "force" AFR in any application which does not have native profile support. You will need to find the "SLI Rendering" option in the 3D Settings menu to set this up. These settings will "not" overwrite any game that already has an SLI profile.



Image





Single GPU: Only one GPU will be used

2 GPU AFR: 2 GPUS will be used in AFR. Default mode for SLI users.

3 GPU AFR: 3 GPUS will be used in AFR. Default mode for 3 Way SLI.

4 GPU AFR: 4 GPUS will be used in AFR. Default mode for Quad SLI



Note: 3 Way will only be available to 3 Way and Quad users. And 4 Way will only be available to Quad SLI users.



Driver Profiling and Nway



Profiles: Nvidia has integrated a application based profile system into their drivers. These driver profiles allow the drivers to tune optimal performance and compatibility on an application specific basic. Profiles updates are provided regularly with new sets of drivers and are commonly released before a new game reaches the market. If your game does not have a profile. You will have to force the driver settings mentioned above or create your own profile.



Image



Nway: Nway is Nvidia's AFR detection system. It works on a pretty simple premise. Nvidia has a profile setup which will enable "Maximum" AFR for how many GPUS present. If a profile is enabled with Nway then it will scale AFR to the maximum amount of GPUS present in the system. Two GPUS will get 2Way AFR and three GPUS will get 3way AFR and four GPUS will get 4way AFR. Most profiles now use Nway. But some older titles will be an exception. Nway should help get the maximum scaling from your GPUS with minimal additional driver support.

#2
Posted 11/13/2009 05:35 AM   
[size=3][b]PhysX Setup And Rendering[/b][/size]

[img]http://chrisray.soterial.com/multigpuguide/bynvidia.png[/img]

[b]Introduction[/b]: With the introduction of PhysX. A whole new way to use your GPUS beyond traditional SLI rendering has come about. Here we will go over turning PhysX on, Setting PhysX devices, and how individual SLI and multi GPU configurations will work as a PhysX rendering setup.

[img]http://chrisray.soterial.com/multigpuguide/setphysx.png[/img]

[b]Enable GPU PhysX[/b]: In order to utilize GPU PhysX. The driver must be turned on to have it enabled. To do this simply enter the SLI and PhysX tab and select enable PhysX. This will turn your GPU into a PhysX device. If you do not have this enabled. All GPU PhysX games will fall back to CPU PhysX.



[size=3][b] Multi GPU PhysX Rendering Options[/b][/size]



[img]http://chrisray.soterial.com/multigpuguide/enablesliphysx.png[/img]

[b]SLI PhysX Rendering[/b]: This will probably be the most common multi GPU PhysX setup so. When SLI is enabled and PhysX is enabled. The first GPU will do all the PhysX workload + standard rendering and every GPU thereafter will do basic SLI rendering operations. This means your primary GPU will be the performance bottleneck of your PhysX performance. So be sure to have your fastest GPU in the primary slot. This is the ideal way to do PhysX when your actually bound by the graphic performance of of your GPUS such as high resolutions and liberal use of anti aliasing settings. Examples below.

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[img]http://chrisray.soterial.com/multigpuguide/sliphysx1.png[/img][img]http://chrisray.soterial.com/multigpuguide/sliphysx2.png[/img][img]http://chrisray.soterial.com/multigpuguide/sliphysx3.png[/img]
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[b][url="http://forums.nvidia.com/index.php?showtopic=148581"]Performance Example Batman AA Physx Preview[/url][/b]

[img]http://chrisray.soterial.com/multigpuguide/sliphysxthumb.png[/img]




[img]http://chrisray.soterial.com/multigpuguide/disablesliphysx.png[/img]

[b] SLI Disabled PhysX Rendering options[/b]: SLI PhysX rendering may not always provide the best results. Especially in applications where you are actually limited by PhysX performance such as lower resolutions in Batman AA. In situations like this it is ideal to actually disable SLI and let the second GPU handle PhysX processing independently. This has the advantage of letting one GPU being fully dedicated to PhysX and having no rendering bottlenecks to deal with. This can actually raise performance in some cases. [url="http://forums.nvidia.com/index.php?showtopic=148581"]Batman AA PhysX Preview[/url] . Examples detailed below.

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[img]http://chrisray.soterial.com/multigpuguide/nosliphysx1.png[/img][img]http://chrisray.soterial.com/multigpuguide/nosliphysx2.png[/img][img]http://chrisray.soterial.com/multigpuguide/nosliphysx3.png[/img]
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[b]Note[/b]: Currently Quad and 3 Way users are limited by which GPUS they can set as a PhysX device. So when using this method the 3rd and 4th GPU are idle. This limitation is something Nvidia is currently looking into.

[b][url="http://forums.nvidia.com/index.php?showtopic=148581"]Performance Example Batman AA PhysX Preview[/url][/b]

[img]http://chrisray.soterial.com/multigpuguide/multiphysxthumb1.png[/img]





[size=3][b]Independent GPU PhysX Rendering[/b][/size]




[url="http://chrisray.soterial.com/multigpuguide/setphysxdevice.png"][img]http://chrisray.soterial.com/multigpuguide/setphysxdevicethumb.png[/img][/url][url="http://chrisray.soterial.com/multigpuguide/multiphysx.png"][img]http://chrisray.soterial.com/multigpuguide/multiphysxthumb.png[/img][/url]



[b]Independent PhysX GPU[/b]: Using an independent GPU dedicated to only PhysX can be ideal compared to standard SLI setups. Especially if you want to have the most optimal usage of SLI or your single GPU. Waste not and want not. This will allow you to keep your Single GPU or SLI setup from using up any resources for PhysX rendering and still provide the benefit of having a PhysX GPU in the system. Examples below.

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[img]http://chrisray.soterial.com/multigpuguide/independentphysx.png[/img][img]http://chrisray.soterial.com/multigpuguide/sliplusphysx2.png[/img][img]http://chrisray.soterial.com/multigpuguide/sliplusphysx1.png[/img]
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[b]Note[/b]: Due to a current limitation within the drivers you cannot set multiple physx devices independently on any GPU that shares the same device ID. For instance. If you have three GTX 260's installed and want 2 way SLI + one 260 PhysX GPU. This is not possible currently. However if you were to use 2 GTX 260's in SLI with 1 9800GTX. You'd be able to set the 9800GTX as a PhysX device. Examples detailed below.

[b][url="http://forums.nvidia.com/index.php?showtopic=148581"]Performance Example Batman AA PhysX Preview[/url][/b]

[img]http://chrisray.soterial.com/multigpuguide/9800GTXPhysxthumb.png[/img] [img]http://chrisray.soterial.com/multigpuguide/mainstreamthumb.png[/img]

[b]Note[/b]: Never forget that your old Nvidia GPU can be saved and used as a PhysX device. Only Geforce 8 and above class cards can be used for PhysX. If you are just using a second card for PhysX your motherboard does not have to be approved for SLI.
PhysX Setup And Rendering



Image



Introduction: With the introduction of PhysX. A whole new way to use your GPUS beyond traditional SLI rendering has come about. Here we will go over turning PhysX on, Setting PhysX devices, and how individual SLI and multi GPU configurations will work as a PhysX rendering setup.



Image



Enable GPU PhysX: In order to utilize GPU PhysX. The driver must be turned on to have it enabled. To do this simply enter the SLI and PhysX tab and select enable PhysX. This will turn your GPU into a PhysX device. If you do not have this enabled. All GPU PhysX games will fall back to CPU PhysX.







Multi GPU PhysX Rendering Options







Image



SLI PhysX Rendering: This will probably be the most common multi GPU PhysX setup so. When SLI is enabled and PhysX is enabled. The first GPU will do all the PhysX workload + standard rendering and every GPU thereafter will do basic SLI rendering operations. This means your primary GPU will be the performance bottleneck of your PhysX performance. So be sure to have your fastest GPU in the primary slot. This is the ideal way to do PhysX when your actually bound by the graphic performance of of your GPUS such as high resolutions and liberal use of anti aliasing settings. Examples below.



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ImageImageImage

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Performance Example Batman AA Physx Preview



Image









Image



SLI Disabled PhysX Rendering options: SLI PhysX rendering may not always provide the best results. Especially in applications where you are actually limited by PhysX performance such as lower resolutions in Batman AA. In situations like this it is ideal to actually disable SLI and let the second GPU handle PhysX processing independently. This has the advantage of letting one GPU being fully dedicated to PhysX and having no rendering bottlenecks to deal with. This can actually raise performance in some cases. Batman AA PhysX Preview . Examples detailed below.



--------------------------------------------------------------------------------------------------------------------------------------------------------

ImageImageImage

--------------------------------------------------------------------------------------------------------------------------------------------------------



Note: Currently Quad and 3 Way users are limited by which GPUS they can set as a PhysX device. So when using this method the 3rd and 4th GPU are idle. This limitation is something Nvidia is currently looking into.



Performance Example Batman AA PhysX Preview



Image











Independent GPU PhysX Rendering









ImageImage







Independent PhysX GPU: Using an independent GPU dedicated to only PhysX can be ideal compared to standard SLI setups. Especially if you want to have the most optimal usage of SLI or your single GPU. Waste not and want not. This will allow you to keep your Single GPU or SLI setup from using up any resources for PhysX rendering and still provide the benefit of having a PhysX GPU in the system. Examples below.



-----------------------------------------------------------------------------------------------------------------------------------------------

ImageImageImage

-----------------------------------------------------------------------------------------------------------------------------------------------



Note: Due to a current limitation within the drivers you cannot set multiple physx devices independently on any GPU that shares the same device ID. For instance. If you have three GTX 260's installed and want 2 way SLI + one 260 PhysX GPU. This is not possible currently. However if you were to use 2 GTX 260's in SLI with 1 9800GTX. You'd be able to set the 9800GTX as a PhysX device. Examples detailed below.



Performance Example Batman AA PhysX Preview



Image Image



Note: Never forget that your old Nvidia GPU can be saved and used as a PhysX device. Only Geforce 8 and above class cards can be used for PhysX. If you are just using a second card for PhysX your motherboard does not have to be approved for SLI.

#3
Posted 11/13/2009 05:35 AM   
Hopefully this setup guide will answer most of the commonly asked questions regarding SLI and PhysX.
Hopefully this setup guide will answer most of the commonly asked questions regarding SLI and PhysX.

#4
Posted 11/16/2009 09:11 PM   
[quote name='ChrisRay' post='951724' date='Nov 16 2009, 11:11 PM']Hopefully this setup guide will answer most of the commonly asked questions regarding SLI and PhysX.[/quote]

Independent GPU PhysX Rendering : not working fine with 3D Vision, we got lot off flickering (unplayable)
[quote name='ChrisRay' post='951724' date='Nov 16 2009, 11:11 PM']Hopefully this setup guide will answer most of the commonly asked questions regarding SLI and PhysX.



Independent GPU PhysX Rendering : not working fine with 3D Vision, we got lot off flickering (unplayable)

#5
Posted 11/19/2009 10:07 PM   
[quote name='Poil' post='953250' date='Nov 19 2009, 03:07 PM']Independent GPU PhysX Rendering : not working fine with 3D Vision, we got lot off flickering (unplayable)[/quote]


Mind detailing your system specifications?
[quote name='Poil' post='953250' date='Nov 19 2009, 03:07 PM']Independent GPU PhysX Rendering : not working fine with 3D Vision, we got lot off flickering (unplayable)





Mind detailing your system specifications?

#6
Posted 11/19/2009 10:42 PM   
[quote name='ChrisRay' post='953268' date='Nov 20 2009, 12:42 AM']Mind detailing your system specifications?[/quote]

Hi,

Here it's : [url="http://forums.nvidia.com/index.php?showtopic=150297&view=findpost&p=952620"]http://forums.nvidia.com/index.php?showtop...st&p=952620[/url]

My hardware cfg :
Q6600 @ 3.2Ghz
Ram : 4096
GTX295 on PCI-E 1.0 x16
8800GT (G80) on PCI-E 1.0 x4
[quote name='ChrisRay' post='953268' date='Nov 20 2009, 12:42 AM']Mind detailing your system specifications?



Hi,



Here it's : http://forums.nvidia.com/index.php?showtop...st&p=952620



My hardware cfg :

Q6600 @ 3.2Ghz

Ram : 4096

GTX295 on PCI-E 1.0 x16

8800GT (G80) on PCI-E 1.0 x4

#7
Posted 11/20/2009 05:26 PM   
Thanks. I'll forward it to Nvidia. Keep in mind many are on holiday vacation.
Thanks. I'll forward it to Nvidia. Keep in mind many are on holiday vacation.

#8
Posted 11/23/2009 06:55 AM   
[quote name='ChrisRay' post='951724' date='Nov 16 2009, 02:11 PM']Hopefully this setup guide will answer most of the commonly asked questions regarding SLI and PhysX.[/quote]


Hello, I have 2 8800 Ultras(MSI-768mb DDR3) and I'm wanting to get a 9800 GT(MSI-1gb,DDR3), can I use 1 of the 8800 Ultras as a PhysX card and the 9800 GT as the main GPU, do they have to be connected by the SLi bridge, I hate to see the 8800's just sit on a shelf in my closet, any help or ideas would be helpful, here's my PC specs:
EVGA nForce 680i LT SLi
Q6600 Quad Core
4gb's G-Skill PC 8500(1066)
ThermalTake 850w PSU

Thank You
pro7one
[quote name='ChrisRay' post='951724' date='Nov 16 2009, 02:11 PM']Hopefully this setup guide will answer most of the commonly asked questions regarding SLI and PhysX.





Hello, I have 2 8800 Ultras(MSI-768mb DDR3) and I'm wanting to get a 9800 GT(MSI-1gb,DDR3), can I use 1 of the 8800 Ultras as a PhysX card and the 9800 GT as the main GPU, do they have to be connected by the SLi bridge, I hate to see the 8800's just sit on a shelf in my closet, any help or ideas would be helpful, here's my PC specs:

EVGA nForce 680i LT SLi

Q6600 Quad Core

4gb's G-Skill PC 8500(1066)

ThermalTake 850w PSU



Thank You

pro7one

Intel Q6600
4gb's of G-Skill PC8500 ( 1066mhz )
EVGA nForce 680i LT SLi
MSI GeForce 8800 Ultra ( Had x's 2-SLi,now it just 1)
ThermalTake 850 watt PSU
ThermalTake Bach V Mid ATX Case
ASUS DVD-RW(SATA)
ASUS DVD-ROM(SATA)
WD 500gb SATA HDD(Internal)
WD 750gb SATA HDD(x's 2-External)
LG Flatron Wide 21inch LCD monitor(1680x1050)

Don't Waste your Time With The Rest, nVidia's The Best

#9
Posted 11/24/2009 09:23 PM   
Yes you could do that. I am not sure your performance would be better off completely doing that. The 9800GT won't be faster than 2 8800 Ultra's in SLI.

Chris
Yes you could do that. I am not sure your performance would be better off completely doing that. The 9800GT won't be faster than 2 8800 Ultra's in SLI.



Chris

#10
Posted 11/24/2009 10:10 PM   
[quote name='ChrisRay' post='955284' date='Nov 24 2009, 03:10 PM']Yes you could do that. I am not sure your performance would be better off completely doing that. The 9800GT won't be faster than 2 8800 Ultra's in SLI.

Chris[/quote]

Thaks for quick reply, 1 of the 2 8800 ultras is going south for the winter(Not Working Well and Warrenty is gone), thats why I was thinking about useing the other 8800 for strictley PhysX and the 9800 GT for the main GPU (Just the 2 Cards) and if I can, how would I go about that( Use the bridge or not and what would be the settings)

Once again, Thank You

pro7one ( Randy)
[quote name='ChrisRay' post='955284' date='Nov 24 2009, 03:10 PM']Yes you could do that. I am not sure your performance would be better off completely doing that. The 9800GT won't be faster than 2 8800 Ultra's in SLI.



Chris



Thaks for quick reply, 1 of the 2 8800 ultras is going south for the winter(Not Working Well and Warrenty is gone), thats why I was thinking about useing the other 8800 for strictley PhysX and the 9800 GT for the main GPU (Just the 2 Cards) and if I can, how would I go about that( Use the bridge or not and what would be the settings)



Once again, Thank You



pro7one ( Randy)

Intel Q6600
4gb's of G-Skill PC8500 ( 1066mhz )
EVGA nForce 680i LT SLi
MSI GeForce 8800 Ultra ( Had x's 2-SLi,now it just 1)
ThermalTake 850 watt PSU
ThermalTake Bach V Mid ATX Case
ASUS DVD-RW(SATA)
ASUS DVD-ROM(SATA)
WD 500gb SATA HDD(Internal)
WD 750gb SATA HDD(x's 2-External)
LG Flatron Wide 21inch LCD monitor(1680x1050)

Don't Waste your Time With The Rest, nVidia's The Best

#11
Posted 11/25/2009 01:23 AM   
No, you would not use the bridge, that's only for SLI. The Nvidia control panel will give you the option which card to enable Physx on.
No, you would not use the bridge, that's only for SLI. The Nvidia control panel will give you the option which card to enable Physx on.

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#12
Posted 11/25/2009 01:33 AM   
[quote name='kev4950' post='955356' date='Nov 24 2009, 06:33 PM']No, you would not use the bridge, that's only for SLI. The Nvidia control panel will give you the option which card to enable Physx on.[/quote]

Thats the quickest responce I've ever seen, so, I'll have to do is go into my nVidia control panel and set the adjustments there as to which I one want as PhysX and which one I want as the main GPU, nothing special that needs to be done or software that needs to be installed ?
Thank You
Randy
[quote name='kev4950' post='955356' date='Nov 24 2009, 06:33 PM']No, you would not use the bridge, that's only for SLI. The Nvidia control panel will give you the option which card to enable Physx on.



Thats the quickest responce I've ever seen, so, I'll have to do is go into my nVidia control panel and set the adjustments there as to which I one want as PhysX and which one I want as the main GPU, nothing special that needs to be done or software that needs to be installed ?

Thank You

Randy

Intel Q6600
4gb's of G-Skill PC8500 ( 1066mhz )
EVGA nForce 680i LT SLi
MSI GeForce 8800 Ultra ( Had x's 2-SLi,now it just 1)
ThermalTake 850 watt PSU
ThermalTake Bach V Mid ATX Case
ASUS DVD-RW(SATA)
ASUS DVD-ROM(SATA)
WD 500gb SATA HDD(Internal)
WD 750gb SATA HDD(x's 2-External)
LG Flatron Wide 21inch LCD monitor(1680x1050)

Don't Waste your Time With The Rest, nVidia's The Best

#13
Posted 11/25/2009 01:38 AM   
[quote name='pro7one' post='955359' date='Nov 25 2009, 01:38 AM']Thats the quickest responce I've ever seen, so, I'll have to do is go into my nVidia control panel and set the adjustments there as to which I one want as PhysX and which one I want as the main GPU, nothing special that needs to be done or software that needs to be installed ?
Thank You
Randy[/quote]

No, nothing special needs doing, aslong as you have some relatively recent drivers installed all you should have to do is click on 1 radio button to enable a dedicated PhysX GPU.
[quote name='pro7one' post='955359' date='Nov 25 2009, 01:38 AM']Thats the quickest responce I've ever seen, so, I'll have to do is go into my nVidia control panel and set the adjustments there as to which I one want as PhysX and which one I want as the main GPU, nothing special that needs to be done or software that needs to be installed ?

Thank You

Randy



No, nothing special needs doing, aslong as you have some relatively recent drivers installed all you should have to do is click on 1 radio button to enable a dedicated PhysX GPU.

#14
Posted 11/25/2009 09:56 AM   
[quote name='Obone' post='955466' date='Nov 25 2009, 02:56 AM']No, nothing special needs doing, aslong as you have some relatively recent drivers installed all you should have to do is click on 1 radio button to enable a dedicated PhysX GPU.[/quote]


Thank You One And All, you've answered all my questions extremely fast and now my 8800 Ultra won't just sit around and collect dust !

Thanks

pro7one
[quote name='Obone' post='955466' date='Nov 25 2009, 02:56 AM']No, nothing special needs doing, aslong as you have some relatively recent drivers installed all you should have to do is click on 1 radio button to enable a dedicated PhysX GPU.





Thank You One And All, you've answered all my questions extremely fast and now my 8800 Ultra won't just sit around and collect dust !



Thanks



pro7one

Intel Q6600
4gb's of G-Skill PC8500 ( 1066mhz )
EVGA nForce 680i LT SLi
MSI GeForce 8800 Ultra ( Had x's 2-SLi,now it just 1)
ThermalTake 850 watt PSU
ThermalTake Bach V Mid ATX Case
ASUS DVD-RW(SATA)
ASUS DVD-ROM(SATA)
WD 500gb SATA HDD(Internal)
WD 750gb SATA HDD(x's 2-External)
LG Flatron Wide 21inch LCD monitor(1680x1050)

Don't Waste your Time With The Rest, nVidia's The Best

#15
Posted 11/25/2009 04:38 PM   
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