Struggling to get advertised speed

[kitkat9933]

I have an Aorus x570 Pro, 3900XT and a Corsair RGB pro 3600mhz kit.

What ever I do, I can't get past 2993mhz. I've followed the guide to do auto XMP and also manual and still no luck...

Please tell mw what I'm doing wrong!

 

[kitkat9933]

BIOS was up to date Apparently it has preferred slots to put the memory in. It was in dual channel but for fastest speed with just 2, needs to be in A2 and B2, not A1 and B1. All sorted