GTX 670 on Mac OSX

i'm on 8 core mac pro a  gtx 670, adobe cc.  raytrace slow hate use it.  interactions nothing short of pathetic.  bad @ 1/4 resolution.  thought maybe b/c have 2 27" cinema displays , many pixels --- maybe i'm wrong.  maybe sucks? 

 

i have latest cuda drivers , that.  if guys know of can improve performance - please share!

the gtx 670 not lsted card after effects use gpu acceleration of ray-traced 3d renderer:

http://www.adobe.com/products/aftereffects/tech-specs.html

 

your poor performance because rendering being done on cpu.

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