OpenGL -Olny for rendered sceans????

I am looking for a performance upgrade for a CAD workstaition, but I am unclear as to the ability of a new video card to improve the performance I am looking for. I want to improve shaded hidden line removal of WIREFRAME geometry. Not shaded image geometry. Is wireframe included in the OGL extensions or only shaded geometry. If I add a video card with dedicated OGL hardware acceleration will it improve my wireframe manipulation or is that only improved by increased CPU speeds?