Get Cuda device unique ID Is it possible Get Cuda device unique ID?

Good day!

I have a cluster with 4 nodes, each node has 2 video cards(nVidia GeForce 8800 GT). When I start MPI application each CPU must use only one video card. When I start MPI application and call cudaGetDeviceCount and cudaGetDevice. As a result cudaGetDeviceCount detects 2 devices and cudaGetDevice says, that 0 device is currently used on each node. Can 2 nodes use only one video card? Is it possible to get some unique information about CUDA device through CUDA API?

The programm gives something like that:

Running on 2 nodes

Node 0 Device 0 of 2: "GeForce 8800 GTX"

Node 1 Device 0 of 2: "GeForce 8800 GTX"

Take a look at this:

http://forums.nvidia.com/index.php?showtopic=98055&view=findpost&p=548063