I have a GF8500GT and a GF8600GTS with Vista x64 and the CUDA 2.0 beta toolkit/SDK + the FW 174.55. The GF8500GT is connected to a display, the GF8600GTS not. I have no SLI bridge connected. Both cards are listed correctly in the Device Manager without any conflict. Only the 8500GT is used to display the Vista’s desktop.
For some strange reason the cudaGetNumDevices() retrieves only one device… the GF8500GT… the GF8600GTS is not listed by CUDA… Curiusly it is with Windows XP Pro x86 SP3… any idea why CUDA cannot see the 8600GTS in Vista, pls?