I get a similar issue but RAM sticks are dark - no RGB. No amount of rebooting fixes it either.
Have iCUE version 4.11.274. RAM was working on the previous version.
Now this is interesting. I also get the memory error from iCue on shutdown and have done for many revisions of the software. I just put up with it!
The point to note though is that I also have the Asus Xonar D2X sound card. Could that be the culprit?
I like the case, but baulk at the cost. I already have a Corsair RGB eco system and don't need more fans or controller.
Please Corsair release a (cheaper) version of the 680x WITHOUT fans!