How to get OpenCL functioning for GPU rendering, AMD GPU? I'm running blender 2.79b and Blender won't recognize my card.

AMD Radeon HD 7900 Series, GCN 1st gen architecture
OpenCL™ Version: 24.20.11021.1000
Vulkan™ Driver Version: 2.0.33

Am I missing something to set it up in an official release?

I tried looking through GraphicAll.org for alternatives and found This Version of Blender

While it did recognize my card the colors of light was incorrect and differed from the cpu rendering of the scene.

Thanks in advance!
From Blender manual on OpenCL support:


  OpenCL is supported for GPU rendering with AMD graphics cards. (We only support graphics cards with GCN architecture 2.0 and above).


2.79 release log says:


  Due to various issues with drivers for AMD GCN 1.0 architecture, those cards are no longer supported for Cycles rendering "


The support was dropped so you need Blender 2.78c version or a newer card.