Final Cut Pro X - Which Graphics Card

Hi All,
my first post here, so bear with me

I'm looking to build a hackintosh primarily because of video editing needs (amateur, nothing professional) in FCPX. From what I understand there are major issues of compatibility between the gcards and FCPX. Are any of the recommended cards tested as working with FCPX under OpenCL, that I could just buy and plug-in?

thanks in advance

Marcin