Resolve 17 not utilizing my GPU?

Hi I'm quite a n00b, so forgive this question if it seems dumb. I'm using DaVinci Resolve 17.0B, build 18 on a Windows 10 PC with an RX 580 GPU.

The sad thing is that Resolve doesn't use the GPU at all...not even a bit... all of the rendering is being done by the CPU.

Is there a way that I can fix this? When I look in the preferences for DaVinci, under Memory and GPU, it says that the GPU Configuration is set to "Auto" with "OpenCL" in a greyed-out box to the right of that, and the GPU selection is set to "Auto" and below that my GPU is listed (greyed-out) with a check-mark to the left of it...

Any help would be greatly appreciated.

only the studio version will use the GPU for rendering on windows

Does v. 16 use the GPU for windows?

[Peter Chamberlain]

Studio version needed for hardware compression in v16 and v17, and future versions

Ok. Thanks for the follow-up. One last question: is there a way to kind of "throttle" the rendering process that uses my CPU in the free version right now? When I render it uses 100% of my CPU making the rest of the computer impossible to use while the rendering is happening. If I could somehow make that a little less than 100%, then the render would take more time, yes, but at least I could do something else while I wait...