ASRock B450M Pro4 memory speeds???

[Astroboyjj]

Can someone please explain this memory speed information? I have recently upgraded to an ASRock B450M Pro4 mobo and am running Vengeance LPX 16GB in a 2x8GB configuration at 3200MHz with XMP. However I was interested in adding a little more and it seems like from the mobo specs page that I would need to run it at a lower speed 2933 or 2667. Can I still run all 4 sticks at 3200 or is 2933 the fastest this mobo can run 4 sticks? I still can't figure out if my memory is SR or DR, is there an easy way to check this? Also, if I bought different Vengeance LPX with the same latency would it be a problem if I mismatched the sizes? (2x8 and 2x16 for example)

 

Here are the motherboard specs I was talking about 

Parts I'm running:

Motherboard: https://www.asrock.com/mb/AMD/B450m Pro4/#Specification

CPU: https://www.amd.com/en/products/cpu/amd-ryzen-5-5600x

Memory: https://www.corsair.com/us/en/Categories/Products/Memory/VENGEANCE-LPX/p/CMK16GX4M2B3200C16#tab-tech-specs

[Jurrunio]

This is visualized memory config support from AMD. Going with higher frequency than what is on the table for the given config just means it is considered an overclock and you're on your own at that point.