Which config is overkill? And yes, that should be future proof for a few years. If you want further futureproofing, head over to a Ryzen based system. I have no idea what you are wanting to use your PC for.. That info would be nice.
You mean before building one? Just make sure the CPU and Motherboard are compatible and you get a PSU with enough wattage, and that everything fits in your case.
I switched around the sticks, and now it will freeze up instead of completely crash. The RGB on the RAM sticks now goes blank, and then a few mins later goes to the default color fade.