The answer to your question is depending on the case manufacturer, if they built the rgb with mb addressable controls they usually come in 2 forms, 5V and 12V headers, most motherboards come with 12V rgb but most cases come with the 5V header, so if you want to control your case rgb make sure its the right voltage and its addressable rgb usually theyll advertise it with their product, I made the mistake of postponing my build so i am stuck with a 5V case and a 12V mb so now i can only control them with the buttons you speak off! I hope I am not too late.