OpenCL device problems

Hello all
Afther reinstaling of Win7 64bit have very strange problem:
one of my app for Photogrametry uses OpenCL device, (Nvidia 560Ti) but im installed first drivers for my motheboard Sabertooth 990FX with the AMD CPU OpenCL drivers and afther that the Nvidia Drivers. In GPU Caps is clearly to see both devices AMD and Nvida, can benchmark with both with LUXMARK 2.0 and they working… So the question is how to get the app recognize my GPU from Nvidia ? some register tweakings or ??
is some priority to firs installed device or im missing something ??

I think you’re better off asking the vendor of your software: it is up to the application to make decisions on what devices to use and OpenCL does not determine this.

have unistalled the AMD CPU driver and the app see my Nvidia GPU back… Thanx