**System Information**
CPU : AMD FX 6300
GPU : AMD R9 270
OS : WINDOWS 10 PRO - Latest AMD drivers 17.9.1
**Blender Version**
Broken: Blender 2.79 Official release, 2.79 RC1 and RC2, 2.80 build
Worked: All versions before 2.78c(including 2.78c)
**Short description of error**
Blender doesnt recognise my graphics card as a cycles rendering compute device. Under preferences in the system tab, it only shows NONE. I am aware that my gpu has GCN 1 not 2. But opencl rendering worked perfectly before on all blender versions.
**Exact steps for others to reproduce the error**
Based on a (as simple as possible) attached .blend file with minimum amount of steps