Maybe update the BIOS?
Otherwise I don't know what to do

Before you buy the RAM, check the official QVL to see if they are compatible, otherwise you could be in for a rude awakening.

Kind regards

I already have the Corsair Vengeance LPX (2x, 8GB, DDR4-3200, DIMM 288) which are also 3200Mhz but they only run at 2133Mhz.

All RAM Rigel in the link are 3200Hz, best 4x8 or 4x16 if you want to exaggerate.

https://www.digitec.ch/de...