OpenACC and cuda OpenACC support on CUDA

Hi all,

I use CUDA toolkit 4.0. I would like to know if I can use the openACC directives with this version of CUDA. Or do i need to download separate openACC supported
compiler or packages. Any info on this would be of great help.

You need to buy a compiler with OpenACC support, currently there are no freely downloadable alternatives (neither is it known that anyone was working on any).

Yes, that is true. Better to use CUDA libraries, which are largely free and similarly require few lines of code to work. Many libraries available for most any problem.