Radeon Pro WX 7100 6K or 8K video in full resolution Adobe Premiere CC

I have Radeon Pro WX 7100 and I cant see 6K or 8K video in full resolution in Adobe Premiere CC or Redcine-X. I dont need to see the whole picture, just a part of it but in full resolution. I can see the picture just on 1/2 resolution. Adobe Premiere shows black screen with full resolution. I dont have problem to see it even with intel integrated card on notebook. Is there any switch in the driver settings? Or It realy isnt capable of rendring 6K picture in full quality/resolution? Thank you for answer. Jakub