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Old 08-11-08, 11:07 PM   #1
3DBrad
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Default So if I buy a GTX 280, my 8800gt will do the physics, on a non-SLI board?

Is this correct, or do I need a SLI board for the 8800gt to do the Physx?

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Old 08-12-08, 01:22 AM   #2
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Default Re: So if I buy a GTX 280, my 8800gt will do the physics, on a non-SLI board?

Yes

Quote:
I have to be honest here, all respect to the PhysX team for making this happen. NVIDIA has created three sets of circumstances on how you can choose to use your PhysX setup from within the PhysX driver, let's have a look:

Standard - one GPU renders both Graphics + PhysX (not ideal as you'll need a lot of GPU horsepower).

SLI mode - have two GPUs render both Graphics + PhysX.

Multi-GPU mode - GPU1 renders Graphics and GPU2 renders PhysX.
For me personally the last option is by far ideal as this is a situation where with any mainboard with two x8 or x16 PCIe slots you can use your old adapter as PhysX unit.

See, you do not need a power-house of a graphics card to deal with the PhysX calculations. Say you have an older GeForce 9600 GT or 8600 GT lying around and you upgraded towards a GeForce GTX 260 (or whatever). Then can you use your 9600 GT (or even 8600 GT) as a Physx unit and the GTX 260 for graphics.

Why do I like that so much? Because you can do something new with an old outdated graphics card and ... and you are not bound to an nForce platform since you are not running SLI mode.
Full article

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Old 08-12-08, 06:58 AM   #3
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Default Re: So if I buy a GTX 280, my 8800gt will do the physics, on a non-SLI board?

Thanks.
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Old 08-12-08, 11:19 AM   #4
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Default Re: So if I buy a GTX 280, my 8800gt will do the physics, on a non-SLI board?

Has this been implemented, anyone have experience with it? Does it create any new issues/side effects?

I'd assume you have to install some software and let it know which card should be used?
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Old 08-12-08, 12:52 PM   #5
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Default Re: So if I buy a GTX 280, my 8800gt will do the physics, on a non-SLI board?

That should be covered in one of these downloads I'd think: http://www.nvidia.com/content/forcew...s/download.asp
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Old 08-12-08, 02:22 PM   #6
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Default Re: So if I buy a GTX 280, my 8800gt will do the physics, on a non-SLI board?

Works for me on none SLI mobo , if you have vista small workaround is needed, until they get somekind of workaround in drivers.

How to do it http://www.guru3d.com/article/physx-by-nvidia-review/3
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Old 08-12-08, 02:24 PM   #7
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Default Re: So if I buy a GTX 280, my 8800gt will do the physics, on a non-SLI board?

Yeah it's kind of hokey they way you have to do it in Vista. From the article DVS linked:


Quote:
Now there's a thing you will need to be aware of in the Multi GPU [non-SLI] mode, it's actually a Vista limitation but a second monitor must be attached to enable PhysX running on the second GeForce GPU. You must extend your Windows Vista desktop onto that monitor.

To bypass that issue, most monitors have a standard VGA and a DVI connector, right? Just use both. This limitation is related to the Windows Vista display driver model (WDDM). This limitation does not exist in Windows XP. In NVIDIA's upcoming drivers, they will be offering a workaround to improve the experience for Windows Vista users.

With a single card or two cards in SLI mode you will not have this problem.
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Old 08-12-08, 04:20 PM   #8
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Default Re: So if I buy a GTX 280, my 8800gt will do the physics, on a non-SLI board?

Quote:
Originally Posted by Stevedroid View Post
To bypass that issue, most monitors have a standard VGA and a DVI connector, right? Just use both.
Would that be safe? 2 inputs to the same monitor sounds a little dodgy to me..
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Old 08-12-08, 07:22 PM   #9
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Default Re: So if I buy a GTX 280, my 8800gt will do the physics, on a non-SLI board?

Its design feature nothing dodgy about it , even comes with a button to switch between inputs
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Old 08-12-08, 09:02 PM   #10
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Default Re: So if I buy a GTX 280, my 8800gt will do the physics, on a non-SLI board?

so I could plug a second card into my kvm switch?
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Old 08-13-08, 06:59 AM   #11
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Default Re: So if I buy a GTX 280, my 8800gt will do the physics, on a non-SLI board?

Well got it working on my pc, not that I can tell. Still can't get on the "extreme Physx" levels on cell factor. Using an evga 9800gtx as primary and an evga 8600gt for physx.
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Old 08-13-08, 10:58 AM   #12
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Default Re: So if I buy a GTX 280, my 8800gt will do the physics, on a non-SLI board?

So what are all the games that benefit from this?
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