DAZ 4.10, something wrong with Iray viewport?

OZ-84

Hi there :-) 

Somehow i get the feeling there is something wrong with the way Daz 4.1 handles the iray viewport. 

Back in the older versions i could hit the render button and pause render ... the usual way ... start after this a fast loading iray preview in the viewport. 

However ... since i updated to 4.10 i have the feeling that the iray viewport render adds to gfx memory consumption. 

Lets say i have a 7gb scene (11gb memory avaiable) it starts like it always did the iray render ... but when i try to switch the viewport to iray it switches to cpu back ...

 

Did somebody observe this too? 

 

Thanks :-D