Using Second Video Card for PhysX

Gigabyte / Ep45-ud3p
January 20, 2009 at 18:18:59
Specs: Microsoft Windows Vista x64 Home Premium, 3 GHz / 8189 MB
I have a EP45-UD3P motherboard from Gigabyte which supports crossfire but not NVidia SLI. Currently I have a GeForce 9800 GTX+ graphics card in the 16x PCI-E slot. I'm not very up-to-date on PhysX, but as I understand it you can now use a compatible graphics card for PhysX processing. I can get a free GeForce 8800GTS. If I do that, can I put it in one of the PCI-E 8x slots and dedicate it to PhysX processing while still using my GeForce 9800 GTX+ for display output? Is it a problem that I can't do SLI?

-Ryan Adams
Free Computer Tips and more:http://RyanTAdams.com

Paid Tech Support: Black Diamond


See More: Using Second Video Card for PhysX

Report •


#1
January 21, 2009 at 09:33:32
nVidia bought out Aegis (developer of Physx) in early 2008 & I believe all nVidia cards since the 8000 series have a PPU (Physics Processing Unit) built into the GPU. In other words, your 9800GTX+ already supports Physx, it just needs the proper driver to activate it & a game that supports it. I don't know why you feel you'd need a 2nd card? Actually, I'm not even sure it can be done, especially considering you have a Crossfire board.

http://www.gigabyte.com.tw/Products...


Report •

#2
January 21, 2009 at 12:08:26
yeah that sounds like the kind of thing that just plain wouldn't work. you'd need your motherboard chipset to support using multiple Graphics/Physics processors, so if you can't do SLI I sincerely doubt you'd be able to use 2 NON-identical nvidia cards on a crossfire motherboard. This almost certainly wouldn't even work on an intel/nvidia chipset either.

way to think about side the box. too bad you're not a developer at ATI or nVIDIA.


Report •

#3
January 21, 2009 at 12:31:25
I thought it was possible to dedicate on card to only do Physx processing and one card to do only the graphics, without using SLI. All the info I have found though is old discussions (from early 08) about it working, but requiring a monitor to be connected to both cards (among other quirks). I figured things might have changed since then...

-Ryan Adams
Free Computer Tips and more:http://RyanTAdams.com

Paid Tech Support: Black Diamond


Report •

Related Solutions

#4
January 21, 2009 at 14:39:52
Do you have any games that support Physx? Regardless, I don't understand the need for the 2nd card?

Report •

#5
January 21, 2009 at 21:45:22
Yeah, Ghost Recon Advanced Warfighter 2 (among others).

My idea is this: My one graphics card is currently doing PhysX in addition to the regular duties of a graphics card. If I could move all that PhysX processing to another card, my primary card would then only have to handle the graphics. That in turn means my computer can do mroe PhysX computations and provide better graphics. Right?

The thing is, from what I have been reading, it's a lot more trouble than it's worth. Many forums talk about not being able to select on card for PhysX processing unless a monitor is actively connected to it. That would mean getting a second monitor, which I wouldn't use, just to allow for the setup I am describing. All these posts are quite old, and I have been unable to find recent posts on the subject. For all I know, these kinks have been worked out with the latest drivers/operating systems/hardware...

-Ryan Adams
Free Computer Tips and more:http://RyanTAdams.com

Paid Tech Support: Black Diamond


Report •


Ask Question