New PC - AMD Ryzen 7 9800X3D

I’m considering building a new system with the AMD Ryzen 7 9800X3D and would appreciate any suggestions for the best RAM and motherboard to pair with it.
I also already have the NH-U12A with dual fans, which should probably be good for the 9800X3D. Additionally, I have a 6900XT graphics card and a be quiet! Dark Power 13 1000W PSU.

How much ram do you want/need and are you wanting to tune/overclock it?

Which features are you looking for on the motherboard?

What is the budget?

64GB RAM, possibly slightly tuned or overclocked. The motherboard has more USB ports, BIOS option for flashing.

Gigabyte X870E AORUS MASTER

ASUS ROG STRIX X870E-E GAMING WIFI

G.Skill Trident Z5 Neo RGB 64GB (2x32GB) DDR5-6000 CL30

That seems like a good pick for RAM. If you want a hands off experience a 6000MT expo kit is best. If you want to manually tune look for 6000+ CL 30-32 Kits because those have Hynix dies. Max performance is probably 8000 MT nowadays but it’s restricted to 32/48GB kits and requires more effort or luck to set up.

For the motherboards those are probably good, but you can probably save some money if you settle for WiFi 6E and USB 3.2 and get X670E. Or if you find an X870 board that offers the USB you need it would suffice too.

All AM5 boards have bios flashback, since AMD mandated it (at least B650 and X670/870)

There are not too many experiences out for X870 yet but both suggestions should be decent lower high end picks.

its 100€ difference between x670E and X870

I always went high end for motherboards. It’s the piece that stays the same over many many years but that’s just ne