AMD Radeon HD7900 - DR Could not find any OpenCL Capable GPU

I'm getting the error message in the post when I try to run DR16.
The system worked fine with DR15.

Is there a list of compatible drivers somewhere?

I'm using driver 21.3.1 but also tried the latest version.
Video card is an AMD Radeon HD7900 series
3072MB VRAM GDDR5 1250 MHz

CPU is i7-3770K @ 3.50 GHz
Ram is 32GB

I'm new to video editing and hoping Davinci Resolve will work on this system.

Thanks
Mike