It is important to watch BOTH parts, as at the end of part 1 I pulled out one of the ram sticks by accident, I have the Corsair fake/dummy rgb enhancement kit.
Pulled a ram stick out instead of one of the dummy sticks.
Part 2 shows and explains this:
https://youtu.be/AYk89xdlh0Ahttps://youtu.be/QN0rV46XGSQ