MSI B550 A Pro Ryzen 5 5600 and ram?

T

tmurd815a602e9

New member
Joined
Sep 17, 2022
Messages
4
I have a MSI B550 A Pro and Ryzen 5 5600. I updated the bios to the latest firmware. However If I put more then one stick of ram in the board wont post it shows the CPU light on. If I have one stick of ram in slot MMA2
Then it'll post just fine. I also have a Ryzen 5 3200 if I put that in the board will boot fine with all 4 sticks of ram. I wondering what steps I should take next to try and get it to support the 4 sticks of ram not just one. I did update to the latest firmware.
 
Sort by date Sort by votes
Main Board: MSI B550 A PRO
Bios Version: Tried 7C56vA9 and 7C56vAB Problem same with both
Video Card: GTX 1660 Super
PSU brand and model: Supermicro cse 826 stock Power supple
12v rail Rating of listed PSU: _______________________________________
CPU: Ryzen 5 5600
Memory: 2 ddr4 3200 CL SP Ram and 60 TB in zfs raid sata.
SSD/ HDD: 2 WD Black 1 TB
CPU COOLER: Stock Ryzen 5 5600 Fan
Raid Card: N/A
Sound Card: N/A
Keyboard: N/A
Mouse: N/A
Any Additional hardware plugged into your system: _______________________________________
OC: (Yes / No)
Operating System: proxmox
 
Upvote 0 Downvote
dag.gebaue155c02d6 said:
Did it post before BIOS update?
Did it work with different RAM?

It could be bent pin on CPU.
Click to expand...
Yes it would post before the update and even after with the updated bios with the ryzen 5 3200 cpu. If I use the ryzen 5 5600 it would not post with all ram slots filled. However it will post with all the ram slots filled having ryzen 5 3200 its weird. I did find out that one of the ram sticks was bad I got brand new. So I'm sending that off to be replaced. That still doesn't solve why no other ram will work.
 
Upvote 0 Downvote
I'm going to see if I can test the ram slots later this week maybe the bad ram chip I got shorted the board idk. Either way it's weird it worked fine before the cpu change using the ryzen 5 3200.
 
Upvote 0 Downvote
I am not sure if I understand, if all ram sticks work with your old processor than why do you think that one stick is bad?

Did you try putting 2 sticks in slots A2 and B2, than if that works try putting tham in A1 and B1 (for dual channel you should use A2 and B2, but just to try if two sticks work in all slots).
Try blowing compressed air in dimm slots, maybe some dust or something got in there.
Check your new cpu for bent pins
 
Upvote 0 Downvote
The ram is controlled by the CPU not the Motherboard it will just set timings and such, So if the Motherboard will run using Four stick with the 3200 but not the 5600 it is likely to be a fault with the memory controller on the CPU.

I could not work out what Memory you have can you list part number.
 
Upvote 0 Downvote
I've got the same issue.

B550 A Pro board - upgraded from a 3100 to a 5600.

Ram sticks are Crucial Ballistix 2 x 16Gb DDR4-3200 (BL16G32C16U4R.M16FE)
Both sticks worked ok with the Ryzen 3100.

With the 5600:
-- Either stick is ok in slot DIMMA2
-- Both sticks are recognized in DIMMA2 and DIMMA1 (but BIOS advises against this)
-- No boot, CPU error light, if 2 sticks are used (DIMMA2 + either of the DIMMB slots).

Tried 2 different recent BIOS versions (A9 and AB).

I'm reluctant to RMA the CPU, as I expect if tested with another MB will be fine.
I'm doubting this is the CPU / memory controller, I think it might be problem with these BIOS versions?
 
Last edited:
Upvote 0 Downvote
Well, rolling back to BIOS 1.2.0.3c should work with that CPU

But ya MY money is on the CPU being bad

As I can swap between my 3900X and 5900X on the same bios same board same memory no problems
With just a Cmos Reset
 
Upvote 0 Downvote
Thanks for the reply.

I think it could be any of these 3 things, but don't want to spend more to find out which:
  1. 1. bad B-slots on MB
  2. 2. bad CPU
  3. 3. unlucky combination of CPU / MB / Crucial memory

Searching I see a lot of issues for MSI motherboards + Ryzen CPU and the B-memory slots, where the A slots are ok but B's don't work reliably.

I've got 32Gb working now using the A2 + A1 slots (I'm thinking running in single channel with external GPU should be ok?)
3D Mark performance seems ok-ish, close to average results at Base clock speeds.
Not much of a plan, but it'll have to do :rolleyes:
 
Upvote 0 Downvote
jb_dumm12e002b2 said:
Thanks for the reply.

I think it could be any of these 3 things, but don't want to spend more to find out which:
  1. 1. bad B-slots on MB
  2. 2. bad CPU
  3. 3. unlucky combination of CPU / MB / Crucial memory

Searching I see a lot of issues for MSI motherboards + Ryzen CPU and the B-memory slots, where the A slots are ok but B's don't work reliably.

I've got 32Gb working now using the A2 + A1 slots (I'm thinking running in single channel with external GPU should be ok?)
3D Mark performance seems ok-ish, close to average results at Base clock speeds.
Not much of a plan, but it'll have to do :rolleyes:
Click to expand...
Performance will be terrible, does sound like the cpu, especially if the 3100 still works the same with that ram.
 
Upvote 0 Downvote
Update:

After both replies, I was planning to return the 5600.
Put the 3100 back in, and now the 3100 not working for slots B1/B2 :(

So I'm thinking it must be the B550A-PRO board, maybe it was on it's way out before... or maybe I somehow damaged it with the swap to the new CPU.
Slots looks clean, and both B1/B2 not working.

Will try some different DDR4 sticks first, to make sure.
Then it's either A1/A2 or new MB :crying:
 
Upvote 0 Downvote
I know this is an old post but maybe this will help someone. I have a MSI x570 A Pro. I was running a Ryzen 5 2600x with 2 sticks of Crucial Ballistic Ram with no issues. When I upgraded to a 5 5600 I could only post with 1 stick of ram. I finally did what I should have done at the beginning and went to the support site for my motherboard. I do know that sometimes you get lucky and ram not listed will be compatible but in this case it appears it was not. When I input the 5 2600x the ram I have showed compatible. When I switched to the 5 5600 the ram no longer was listed. Both do work on my Asus board but my MSI board has more features. I'll try some ram listed on the support page and see how that works and update at a later time after my new case gets here.
 
Upvote 0 Downvote
tlkraus196158702e3 said:
I know this is an old post but maybe this will help someone. I have a MSI x570 A Pro. I was running a Ryzen 5 2600x with 2 sticks of Crucial Ballistic Ram with no issues. When I upgraded to a 5 5600 I could only post with 1 stick of ram. I finally did what I should have done at the beginning and went to the support site for my motherboard. I do know that sometimes you get lucky and ram not listed will be compatible but in this case it appears it was not. When I input the 5 2600x the ram I have showed compatible. When I switched to the 5 5600 the ram no longer was listed. Both do work on my Asus board but my MSI board has more features. I'll try some ram listed on the support page and see how that works and update at a later time after my new case gets here.
Click to expand...
After ordering compatible ram per MSI's website, I still cannot run 2 sticks of ram with my 5 5600 unless I put the cpu and ram in my old ASUS board.
 
Upvote 0 Downvote
Back
Top