Ram stuck in single channel.

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.....

Windows sees all 4 sticks but will only let me use two. And I have done it one by one with each stick and in two stick combos Windows uses any of the for in a two stick set up running in dual channel mode too. NONe of my sticks are bad at all. All 4 will run perfect in ANY 2 stick combination in ANY of the dim slots. So no it's not a bad stick or dim slot or a bad seat. Bios sees all four Windows does too but it will only let me use 16 because they are stuck in single channel in the bios ONLY when all four are installed. Everything is great when only two are in there Windows sees both and uses both and they run in dual channel in any combination of sticks or dims doesn't matter works great but with four it sh*ts the bed.

Thanks, TJefFreeze.  The only suggestion I have now is to open an AMD support request.  I have used it recently and it worked great for me.  Please keep us informed here.  Thanks and enjoy, John.

EDIT:  Have you tried setting UEFI Defaults? - F9 in my BIOS.

Edited by MisterJ - 06 Jun 2017 at 8:57am

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

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