Interesting I did a google for it and found this on Reddit, now I am confused lol.
"If like me you don't want to have multiple bloated RGB software running but still happy with setting a single effect and not wanting to change it after it's set, this module allows you to save RGB effect onto the hardware i.e. it doesn't need software to run. So, you can install Corsair iCUE > set up your effect in the hardware RGB settings (not the software part) > then remove iCUE software, and then you're done."
I think maybe you have to set the hardware effect eg. static colour or static gradient etc. Then delete any software effects, then close ICUE and it might still have RGB on due to the hardware profile? Then there is the problem of whether it goes off in hibernate, but I think most RGB RAM *SHOULD* go off in hibernate as the RAM is off whereas in sleep it is still powered.