Running Optix 4.0beta with CUDA 8.0RC not supported..

Hi,
I know should be expected but getting error:
OptiX Error: Parse error (Details: Function “_rtProgramCreateFromPTXFile” caught exception: C:\ProgramData\NVIDIA Corporation\OptiX SDK 4.0.0\SDKbin2\lib\ptx/glass_generated_pinhole_camera.cu.ptx: error: Failed to parse input PTX string
C:\ProgramData\NVIDIA Corporation\OptiX SDK 4.0.0\SDKbin2\lib\ptx/glass_generated_pinhole_camera.cu.ptx, line 9; fatal : Unsupported .version 5.0; current version is ‘4.3’
Cannot parse input PTX string
file:C:\u\workspace\goldenrod-win64-build\sw\wsapps\raytracing\rtsdk\playpen\goldenrod\src\Compile\PTX\PTXtoLLVM.cpp, line: 71, file:C:\u\workspace\goldenrod-win64-build\sw\wsapps\raytracing\rtsdk\playpen\goldenrod\src\Compile\PTX\PTXtoLLVM.cpp, line: 71)

I assume final Optix 4.0 version will support CUDA 8.0 right?
if not how to use a GTX 1080?

Just use CUDA 7.5 for now.
The generated PTX code is rewritten by OptiX internally and sent to the CUDA driver for assembly.
That CUDA driver comes with the display driver and will support the Pascal architecture.
Your original PTX input doesn’t need to be compiled for the newest Streaming Multiprocessor version.
Anything from SM 2.0 to SM 5.2 will do with CUDA 7.5.