Very possibly - it's the first thing i do/advise when building a Ryzen system.I just haven t got round to a BIOS update etc yet...could that be a problem you think?
CPU, 1 stick, GPU - flash the system with a FAT 32 formatted USB using - EZ Flash(?) as it's ASUS. (i mainly use Gigabyte so use q flash).
Obvioulsy, your system is fully built - so go for it if you believe it's stable.
Perhaps clear CMOS and load optimised defaults before flashing...