Is OpenCL possible within Blender either via cycles or internal? I have the  Radeon R9 280X video card and was wondering if there was anyway at all to enable GPU rendering with this card? I know Nvidia has CUDA cores and that works. That's good and all, BUT I don't feel like dropping $900 on one of those cards.

I did some research on OpenCL with Blender (which seems to be compatible with AMD cards), but it seems the functionality has been disabled within Blender??

I would like to use cycles with the card, but if that is not a viable option then I'll stick with Blender internal. I just hate CPU based rendering. It takes ages to do the renders.
Blender Internal
BI never had any kind of GPU rendering support, and as development on BI has stopped, probably never will.
Cycles
Cycles only supports cuda at the moment, due to issues with amd/ati drivers. (also see the wiki)
However, there are some experimental tests using the &quot;leaked beta version of what might be AMD's next official drivers&quot; which you may want to try.