@MartinSK

Well, I'm no IT-expert myself - far from it - but to the best of my knowledge I would assume you should get a lot more than 5 - 10% increase if the GPU was used.
The difference between Sunflow and f.i. Firefly (a GPU-Based renderer for Poser Pro), is like night and day. Firefly renders in minutes an image that will take Sunflow hours to complete.

You might find THIS THREAD interesting.


cec