AMD Radeon RX 470 4GB
Worked: 2.78, 2.8
GPU Compute is grayed out and under System in User Preferences "None" is the only Cycles Compute Device. Used to work in 2.78 and 2.8 but now doesn't work their as well. Graphics Card works fine everywhere else. Only after 2.79 install were problems encountered.
Exact steps for others to reproduce the error
Attempt to run blender 2.79 with Radeon RX 470 4GB