But having the OIDN (The Intel denoiser) why do you want Optix?
I mean… optix works only in Nvidia cards, and it’s the same as OIDN with the exception that OIDN works in any CPU and it’s a compositing node, with is cooler 
Also you already have Optix Denoiser as an addon.
Cheers!
Hi, there are pre build binaries including standalone called “denoise”.
It only work with .pfm image files.
A user with python knowledge and imagemagic can easy include it in to any Blender version.
Cheers, mib
It is already included, there is a patch by Stefan Werner that implements OIDN in Blender
EDIT: It’s not yet in master, but it seems it will be