vray rt and 2 graphics cards

[simonm]

Hi guys

 

I have now installed my second graphics card – so now I have:

 

EVGA GTX 780 6gig

Quadro 4000

 

Im wanting to use vray RT but im getting mixed results and I want to be sure im doing it right as ive spent hours with trial and error testing.

So I want to use my GTX for the RT and the Quadro as the viewport – is this how I would set it up in the openCL devices dialogue?

 

And within vray itself, is this set up correctly?

 

 

What I am experiencing is that with the current set up as per the settings attached, during RT the viewport is very bad and slow. However when I switch to the quadro 4000 in the openCL devices, the RT feedback isn’t as quick but the viewport is very responsive.

 

Any idea what I'm doing wrong or how to fix?

 

PS using latest vray and 3ds 2015

Thanks