Help with second nvidia card for Physx/CUDA

[Smidgerine]

I've currently got a Gigabyte GA-H55M-USB3 MicroATX board and a Galaxy GTX 480.

The microATX board has an extra PCI-E Slot, so I thought I'd put in a GT 240 card for Physx (and my CUDA development). But, when I put the GT 240 card in, windows doesn't ever see it. The fan on it is twirling, so it's got power. Can I not do this because this motherboard doesn't support SLI? I know I'm not SLIing, but is that the problem, or am I being stupid somewhere else. I ran the CUDA device query and it only sees one device.

In device manager I have a PCI Simple Communications device that doesn't have a driver. I have no earthly idea what that could be for. But, it is in there whether or not I have the GT 240 in the system. I don't see any entry for the GT 240 anywhere.

Is what I'm wanting to do not possible or any ideas what I might be doing wrong? Thanks in advance.

 

[bryanW1995]

using a gt 240 for physx would probably slow down your system anyway. you want something beefier, probably at least a gtx 260, to run physx on that setup.

 

[Grooveriding]

Spend some more money and go SLI, or just stay with what you have.

Buying a card just for physx is a waste of money and not worth it.

 

[Keysplayr]

GT 240 has 96 shaders (similar to my 9600GSO I tested extensively for PhysX) and should be fine for PhysX.
OP. That PCI communications missing driver could be a clue. You may need to check your motherboard manufacturer web sitew and make sure that you not only have the latest drivers for your mobo, but also ALL the drivers for your mobo. It could be that missing driver might be responsible for communication over the rest of the PCI bus and cannot recognize the card.
Test:
Swap card positions and see if then the GT240 is detected and the 480 is not.