I have updated mine, while he hasn't, because my keyboard wasn't recognized by the bios without it.
Though after more testing, it seems the problem lies in the graphics card (sadly).
If I unsync it, the motherboard and RAM are doing the rainbow smoothly, but if I include it, the rainbow goes back to stuttermode.
Because of this, I tried REVO-uninstalling the "Aura for Graphics cards and [...]", but to no avail.
I don't know why my 1080 is murdering the rainbow effect, but I suspect the Graphics card Aura and normal Aura are somehow incompatible.
(As far as I know, my friend did not install aura for gaphics)