Yeah you can use the Steam version of the sim and not run it through SteamVR. This is what I do.
In your Kronos OpenXR registry you need to change it to the Oculus registry. If you’re running it all on your C drive just copy and paste this
C:\Program Files\Oculus\Support\oculus-runtime\oculus_openxr_64.json
That should point it in the right direction. Now you can boot up the sim and when you’ve hit the ‘ready to fly’ button go to settings and hit the launch in VR button and it should connect you in.
Edit. 2.0 Ghz is fine for your link cable. Thats what I get.