System Information
Windows 8.1
AMD FX 8350 Black
Sapphire r9 290 tri-x
8gb ram
asus m5a97 evo r2.0
Blender Version
Broken:Blender 2.77, glass material in cycles renders glossy when i use my graphic card.
Worked: with cpu usage
The glass material is rendered as a glossy material when i use my graphic card to render, it happens in the viewport and also when i press 'render'.
(It worked when i use other Blenderversions, and i had never such problemes)