Bios no detecting Dual-channel memory

pedre, if berner turns out to be correct, please report this to ASRock support.  What is your onboard hex display showing?  I can find little information on this (please ask support), but here is a link to some codes.  I could not find out what a "Good" POST code is (and no machine).  Perhaps POST is reporting the memory errors (many) but booting anyway so you can have a running machine.  I suggest you test your memory first as berner recommended.  Enjoy-really this is the fun part-, John.

pedre, please post the code(s) you are seeing.  I posted a hyperlink in my last reply that has some POST codes as does the User Manual you DLed.  I hope you will contact ASRock Support and tell them about your sequence of events.  It does seem you have a bad B2 slot.  It is not recommended, but you could try A1 and B1 and see if Dual Channel is active.  I am glad to help and hope that I can and do.   Enjoy, John.

pedre wrote: wardog wrote: Your memory. Can I guess and say it's 2 16GB(2x8GB) Kits, and not a matched 32GB (4x8GB Kit? Those are the memories: http://www.crucial.com/usa/en/ble2k8g4d26afea  I checked RAM compatibility and should work fine with my asrock fatality ab350 k4

Sorry to say, your model of memory is not compatible according to Crucial:



You can check for yourself here: http://www.crucial.com/usa/en/ble2k8g4d26afea

It is common for memory that is not compatible, not configured correctly, or over clocked beyond the limits of the memory or memory controller, to only be partially recognized. That means it may be seen by some programs like CPU-Z, and partially recognized in the UEFI/BIOS, but it will not work correctly with Windows. Since only one DIMM is recognized as fully working, that is why you see single channel mode.

The XMP profile won't help you, since it was designed to work with Intel boards.

Memory compatibility is the biggest issue with Ryzen systems. The memory most likely to work uses memory chips made by Samsung. Since Crucial makes their own memory chips, they do not use Samsung memory chips.

Crucial states the memory is not compatible, but you MIGHT have a chance of getting it working, since one DIMM is working correctly.

Did you try both DIMMs in the A2 and B2 slots to be sure that both of them are working, and that one of them is not bad?

How are you configuring your memory in the UEFI/BIOS? Did you set the timings manually? Did you try increasing the DRAM voltage to 1.35V? Did you try setting the speed to 2133?

parsec wrote: Sorry to say, your model of memory is not compatible according to Crucial: You can check for yourself here: http://www.crucial.com/usa/en/ble2k8g4d26afea

MisterJ wrote: pedre, a simple pencil eraser works great on contacts.  I would also try one card in each slot.  I guess this could be a processor problem but more likely an MB problem.  Enjoy, John.

Erasres is the slots will damage the tensioned "fingers' within.

And, if you ARE going to use an eraser on the mems fingers pull down on them one by one. NOT streak/run the eraser from end to end.

pedre wrote: Yes I tried both slots, A2 works fine with both ram modules, but B2 does not work (not even POST) like no ram was inserted at all, thats why I think it could be a malfunction.

Sorry for not completely reading to this point .......

1. Do both sticks work in at leasr one slot, other than the bad one you have?

If so, I'd pull the CPU and look for bent and or missing pins. Most times if it's one slot that doesn't work it ends up being pin related. I know. That sucks, but .........