i had issue with my combo 1700 + msi b350m mortar as well with Trident Z 3200 (not rgb one).
windows boot up fine, but randomly BSOD.
i tot bcoz i played with the vcore / cpu frequency, but kept happening even when everything at default.

end up test stable at 2933mhz.
some ppl suggest to set Ram volt to 1.35v instead of auto.
now working fine so far no bsod 

ps~ updating bios could work or cause bug too.
i had no issue before updating to latest bios, no bsod running at 3200mhz .
also the vcore reading on new bios on auto was quite high at 1.3+volt.

Can anyone advise where to get good compatible rams for Ryzen 7 1700 ?

16 x 2 , 32gb kits ?

I'm also looking for 2x16GB Samsung B-die RAM