Hello,
For the ram I focused on the QVL list I have highlighted some 2x4gb.
3 corsair and 1 patriot.
When you can take a look and tell me your opinion.
QVL
https://www.asus.com/us/Motherboards/PRIME-B450M-A/HelpDesk_QVL/
corsair cmd8gx4m2b3733c17 (ver4.24) 3200 MHz
corsair cmk8gx4m2b3600c18 (ver4.24) 3200 MHz
patriot pve48g300c6krd 3000 MHz
corsair cmk8gx4m2b3000c15 (ver3.21)