Question Motherboard only recognizes one DDR5 RAM stick at POST ?

[albertkao]

Motherboard: ASRock B650M Pro RS with BIOS version3.10
CPU : AMD Ryzen 5 8500G.


I put the TeamGroup T-FORCE VULCAN Z DDR5 RAM 32GB (2x16GB) 5200MHz in the DIMM slots:
A2
B2

I have only one TEAMGROUP MP44L 1 TB M.2-2280 PCIe 4.0 X4 NVME SSD.
I put it on the gen 5 SSD socket (M2_1) but it prevents the POST screen from appearing, i.e. only a blank screen appear, so I remove it for now.
Then I get the POST screen.

However, ASRock B650M Pro RS and 8500G only recognize one DDR5 RAM at the A2 slot but its speed is at 4800Mhz, not 5200MHz.
The other three slots are "Not Present".
What do I do now?
Do I remove and reinsert the DDR5 RAM at the B2 slot until it is recognized during POST?
Do I put the gen 4 SSD on a gen 5 SSD socket (M2_1) only after both RAM sticks are recognized during POST ?

 

[Ralston18]

How long are you waiting?

This motherboard?

https://download.asrock.com/Manual/B650M Pro RS.pdf

(Verify that I found the applicable User Manual.)

First read/review the entire User Manual. Check everything as you read through.

Pay close attention to all fine print, details, warnings, etc.

RAM is presented on physically numbered Pages 25-26. Check that the RAM is supported, correctly installed, and configured.

Check BIOS as well.

 

[albertkao]

How long are you waiting?

This motherboard?

https://download.asrock.com/Manual/B650M Pro RS.pdf

(Verify that I found the applicable User Manual.)

First read/review the entire User Manual. Check everything as you read through.

Pay close attention to all fine print, details, warnings, etc.

RAM is presented on physically numbered Pages 25-26. Check that the RAM is supported, correctly installed, and configured.

Check BIOS as well.

Yes. You found the applicable User Manual.
The POST screen appeared 10-15 seconds after the computer is turned on.
Then it stayed the same (was unchanged) after a long time (more than 30 minutes).
Is there a way to change the "RAM training" time?

 

[Ralston18]

Not that I am aware of.

In any case , the process needs to complete.....

FYI:

Memory Training

https://www.clrn.org/what-is-memory-training-ram/#google_vignette

That said, 30 minutes is likely some other problem or combination of problems.

My immediate suggestion is to take another look at the build starting with Section 2.14 (Page 50)
and then all of the following Sections include Wifi install.

Doublecheck it all.

Objective is to rule out errors of omission or commission.

 

[albertkao]

I do not have Wifi.
I clear the CMOS Jumper for 20 seconds.
I remove and reinsert the DDR5 RAM at the B2 slot.
I turn on AC power to boot the system.
ASRock B650M Pro RS and 8500G still recognize only one DDR5 RAM at the A2 slot but its speed is at 4800Mhz, not 5200MHz.
The other three slots are "Not Present".
CPU, DRAM LEDs Post Status Checker (PSC) (Page 50) are RED.

 

[CountMike]

I do not have Wifi.
I clear the CMOS Jumper for 20 seconds.
I remove and reinsert the DDR5 RAM at the B2 slot.
I turn on AC power to boot the system.
ASRock B650M Pro RS and 8500G still recognize only one DDR5 RAM at the A2 slot but its speed is at 4800Mhz, not 5200MHz.
The other three slots are "Not Present".
CPU, DRAM LEDs Post Status Checker (PSC) (Page 50) are RED.

Which BIOS version ? I suggest installing 3.15.
Try the other stick in A2, one may be bad. Make sure you properly reset CMOS between memory changes.

PS. SSD has no bearing on RAM
Pss, bent contacts in the socket can be a cause for RAM problems.

 

[ohio_buckeye]

Agreed. Update bios to latest version, then see how it does. If not working, place the other stick in the known good slot. If that works, try one of the sticks in the non working slot with no ram in the “good” slot just to see what happens.

 

[albertkao]

I updated bios to latest version 3.20.
Only one DDR5 RAM is recognized at the A2 slot.
The other DDR5 RAM is not recognized at the B2 slot.
It prevents the POST screen from appearing, i.e. only a blank screen appear, at the A1 or B1 slot.
I ordered a new DDR5 RAM.
I installed linux successfully on the SSD.
USB, Ethernet works as expected.
Thanks for your help!

 

[albertkao]

I tried a new DDR5 RAM.
The computer boots successfully with the same result.
Only one DDR5 RAM is recognized at the A2 slot.
The other DDR5 RAM is not recognized at the B2 slot.

 

[CountMike]

I tried a new DDR5 RAM.
The computer boots successfully with the same result.
Only one DDR5 RAM is recognized at the A2 slot.
The other DDR5 RAM is not recognized at the B2 slot.

You might have damaged CPU socket. Check for that first.