Ram stuck in single channel.

Did you ever sort the problem out I'm having the same issue pins seem fine the slots work with the same ram and different ones I even changed my cpu can't seem to find anything my bios does not have xmp either

Have you tried dropping your memory speed down to 1866 and working your way up? Looking at the product webpage for your board it supports from 1866 up to 2400 if ure using all 4 slots. I know flarex is supposed to be 100% ryzen compatible but still worth a shot.

I will be posting results tomorrow I spent the entire day doing what Asrock suggested but it was same ole same ole . I will give this a shot after work today

TJefFreeze wrote: Asrock Killer SLI/ac 32 gigs gskill flare x 2400 Ryzen 1700 Windows 10 home 64bit... Please anyone... Ok I have ruled out any bad dim slots all of them work with ANY of the ram sticks installed. Either single or in a two stick set up. With two sticks installed it runs dual channel no problem in either a1 b1 setup or a2 b2 setup with any of the four sticks working with each other in all combinations. I have reflashed the bios with one two and 4 sticks installed. I have reseated a thousand times. So at this point I know that all four sticks work great and fine with each other. I know that all of my dim slot work fine etc. Yet when I have all four of my sticks installed I am stuck in single channel and when I look in my bios it says it sees all four sticks and they are running fine but single channel. Windows says I have all 32 gigs installed but can only use 16.... I am completely at a loss of what to do.....

Hello TJefFreeze,

I also run 4 sticks of DDR4 memory. I read through the thread so far and I didn't see a reference to 's/n(serial number) sequence'. I purchased a QAUD channel set. Therefore each memory stick has a serial number from SN#...xxxxx01, ...xxxxx02, ...xxxxx03, ...xxxxx04(just pretend it is this sequence). The memory stick that ends in '01'(or whatever your lowest range stick is, place that in Channel A, Slot 2. The memory stick that ends in '02', place that in Channel B, Slot 2. Then the final two in Channel A/Slot 1 and in Channel B/Slot 1, respectively('03 and 04' SN#'s).

Attempt this and it may correct your situation. If you purchased 2 separate dual channel kits, find out the SN#'s and use the lowest ranged in the A2/B2 and the higher ranged in the A1/B1 channel/slots.

Hope it helps, otherwise it is a separate issue that is causing your configuration dilemma.

Edited by Kevin A - 07 Jun 2017 at 2:04pm

Hey there, I think we are facing more or less the same problem, probably it won't help but thats the topic I opened a few weeks ago: 

http://forum.asrock.com/forum_posts.asp%3FTID=5053&KW=&title=bios-no-detecting-dualchannel-memory%20

After some testing they told me that it was caused because CPU pins are bended but i checked and they are alright so the problem its due to malfunction or a bios issue.



Edited by pedre - 06 Jun 2017 at 3:45pm