We had a thread not so many days ago.
R3D runs mostly on CPU so i believe even if GPU would scream it dose not make your machine
much faster as data lane speed and cpu speed will not be amplified.
—
Margus
https://iconstudios.eu
DaVinci 9, OSX 10.7.4
MacPro 5.1 2×2,93 24GB
GTX 470 / Quadro 4000
Multibridge 2 Pro