[StainlessS]

As huhn said.
Crucial is usually pretty good at providing compatible mem for any board,
for yours here:- https://uk.crucial.com/compatible-up...rime-b350-plus
NOTE, there are 4 pages of mem configurations at above page.

These upgrades are guaranteed compatible when you order from Crucial.com
Max Unbuffered DDR4 SDRAM: 64GB

So 64GB, with 4 DIMMs = max 16GB per DIMM.

EDIT: Note, this line in the huhn linked "PRIME-B350-PLUS_Memory_QVL_180126.pdf"
seems to be rubbish, I doubt that you have 16 DIMM slots (or even 8).

ADATA AD4U2133W8G15-B 128GB( 16x 8G) DS SK HYNIX H5AN4G8NAFR 2133 2133 ● ● ●

EDIT: Crucial always used to provide good ram for eg DELL boards, Dell were usually guilty of removing identifying info from
DIMMs provided by them, so you had to pay Dell's inflated prices to get working Dell mem.
I presume that this dubious practice is still the case with Dell mem.

EDIT: Crucial stuff can usually be gotten via Amazon.
Crucial Store @ Amazon.co.uk:- https://www.amazon.co.uk/stores/Cruc...0?ref_=ast_bln

EDIT: To below

That's just a typo, it means 16 chips of 8Gbit each onboard the card. It's a common way of denoting DRAM configuration, but of course there's only 128Gbit, or 16GB on it.

Makes sense.