For example -- https://www.newegg.com/Product/Product.aspx?Item=N82E16820232408&ignorebbr=1 -- will that RAM work on the board or no dice?

Anyone have any recommendations on b die for this board?

I am new to this and am just trying to figure it all out -- thanks for the help!

Just to be clear here, I think what you mean to say is that every memory chip on the QVL list for an AB350M Pro4 motherboard is recognized by the BIOS on power up, which means that it will automatically read the XMP data from the memory chips and run the memory at that speed.

Honestly, this raises a question for me though. Does ASRock BIOS attempt to run the QVL memory at the fastest XMP memory speeds it recognizes?

If the memory chips are not recognized by the BIOS at power on you can still activate the XMP in the BIOS manually. I had to do this for my memory kit. My memory kit is rated @ 3000MHz and would always boot up @ 2133MHz in this motherboard. So, I specifically had to enable XMP in the BIOS and select a memory speed and the timings for that memory speed. It wasn't very fun at all. The next BIOS will probably make it easier for the next guy but I got it done the hard way.

My memory model # is on the QVL list for this motherboard using a Raven Ridge CPU but you'll notice ASRock sometimes follows up model numbers with additional numbers in parentheses. If you see these additional numbers in parentheses be very cautious about choosing the memory kit even if you match the model numbers up. Because it's very hard to know for sure exactly what memory dies you'll end up getting. This is my case exactly although I've been fortunate enough to figure out some stable timings for my system through trial and error.

Oh okay. So much confusion for me. So even if my memory kit is on the QVL list for RR (which I think it is but how would I know for sure) the BIOS is only going to boot up at it's.....hmmmm.....whats the best word here...."base speed"?

I've been talking about my 3000MHz chips as though that WAS the rating of the chips. But now that you mention it, CPU-Z reports my SPD->Max Bandwidth as "DDR4-2132 (1066MHz)".

So many vague words being tossed around.

So my 3000MHz memory is actually "rated @ 2133MHz" but will O.C. to 3000MHz. ASRock BIOS will never use an XMP speed but rather the unoverclocked "rated" speed by default? I see, yes, it makes sense now. Since that's what it did before I changed it to use XMP manually.

But answer me this question. What's the point of having it set to "Auto" in the BIOS for XMP? I thought "Auto" meant something like "find me the highest stable speed you can by looking at the XMP data on the memory chips." So, "Auto" just means, use the default unoverclocked speed?

Good stuff to know if I am hearing you right. Like I said, it was pain in the neck to get my chips running stable @2934MHz. I wish ASRock would see my model number on my chips and then use that data to get the fastest speeds. And set that data for me automatically.

I guess until we get an equivalent from AMD to Intels XMP data we will have to do it the hard way for a bit longer.