MSI B450M motherboard

Mixed DDR4 sticks become unstable at 3200 MHz with XMP—what settings should I use?

I'm running a Ryzen 5 5600GT on an MSI B450M-A PRO MAX II with one Patriot 8GB DDR4-3200 CL16 stick and one Corsair Vengeance LPX 8GB DDR4-3200 CL16…