So if I buy a GTX 280, my 8800gt will do the physics, on a non-SLI board?

3DBrad · 08-11-08, 11:07 PM

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

750watt PSU from Thermaltake, btw.

**rap1d^** · 08-12-08, 01:22 AM

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 Because you can do something new with an old outdated graphics card and ...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

3DBrad · 08-12-08, 06:58 AM

Thanks.

Vanzagar · 08-12-08, 11:19 AM

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?

Thunderbolt56 · 08-12-08, 12:52 PM

That should be covered in one of these downloads I'd think: http://www.nvidia.com/content/forcew...s/download.asp

-=DVS=- · 08-12-08, 02:22 PM

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

Stevedroid · 08-12-08, 02:24 PM

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.

LitHiuM · 08-12-08, 04:20 PM

Quote:

Originally Posted by Stevedroid

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..

-=DVS=- · 08-12-08, 07:22 PM

Its design feature nothing dodgy about it , even comes with a button to switch between inputs

**rage10** · 08-12-08, 09:02 PM

so I could plug a second card into my kvm switch?

k0py · 08-13-08, 06:59 AM

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.

Vanzagar · 08-13-08, 10:58 AM

So what are all the games that benefit from this?

08-11-08, 11:07 PM	#1
3DBrad Registered User Join Date: Sep 2006 Posts: 2,260	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? 750watt PSU from Thermaltake, btw.

08-12-08, 06:58 AM	#3
3DBrad Registered User Join Date: Sep 2006 Posts: 2,260	Re: So if I buy a GTX 280, my 8800gt will do the physics, on a non-SLI board? Thanks.

08-12-08, 11:19 AM	#4
Vanzagar Bring me Amberlamps Join Date: Jul 2004 Posts: 2,167	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?

08-12-08, 12:52 PM	#5
Thunderbolt56 Gladiusdoctori Join Date: Aug 2004 Location: Daytona Beach Posts: 198	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

08-12-08, 02:22 PM	#6
-=DVS=- .:. Lafiel .:. Join Date: Jul 2002 Location: Outerspace Posts: 3,009	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 __________________ *.:. Lian Li X500FX .:. i7 2600k* .:. PNY GTX 680 .:. Corsair DDR3 8GB .:. Silverstone 800W PSU .:. Asus P8P67-M Pro .:. Crucial M4 SSD 512GB .:.**

08-12-08, 07:22 PM	#9
-=DVS=- .:. Lafiel .:. Join Date: Jul 2002 Location: Outerspace Posts: 3,009	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 __________________ *.:. Lian Li X500FX .:. i7 2600k* .:. PNY GTX 680 .:. Corsair DDR3 8GB .:. Silverstone 800W PSU .:. Asus P8P67-M Pro .:. Crucial M4 SSD 512GB .:.**

08-12-08, 09:02 PM	#10
rage10 Registered User Join Date: Oct 2005 Location: In the clouds!:) Posts: 1,252	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?

08-13-08, 06:59 AM	#11
k0py YAAY TRICK!!! Join Date: Apr 2008 Location: Planet Earth Posts: 41	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. __________________ __________"The Beast With Two Heads II"__________ Mobo: Asus P5N-E SLI 650i (Come on X-mas) CPU: Intel Core 2 Quad CPU/Q6600 @ 2.8ghz 1250fsb/Zalman 9500 Memory: 2 X 2048MB Corsair XMS2 6400@625mhz 4-5-4-15-2t 1:1/Dominator Fan GPU: 2 X GeForce 9800 GTX In SLI @ 715mhz c.c./1782mhz s.c./2.25ghz m.c.(1xBFGoc2 1xEVGA) PPU: Geforce Physx Enabled Hard Drive: 2 X 300GB Seagate Barracuda R.I.P. /120GB Maxtor P.A.T.A(crap) Monitor: 28" Hanns G HG281 1920 x 1200/50" Phillips 720p Sound Card: Creative X-fi Xtreme Gamer Speakers/Headphones: Creative Inspire 5.1 Surround Sound Operating System: Windows Vista™ Home Premium Service Pack 1 3Dmark03: 61,921 3Dmark06: 15,213 Vantage: 13,105

08-13-08, 10:58 AM	#12
Vanzagar Bring me Amberlamps Join Date: Jul 2004 Posts: 2,167	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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