m2_1 on b550-a pro

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I just got my new pc stuff in today the b550-a pro, and went to instal it. but when i booted up my kingston SA2000 m8 1000g wasnt found.

Seems it does work in the second slot. so i got up and running.
But is this how its supposed to be or is my first slot dead and should i return the board?
Specs say both should support pci, with only the first doing sata as well?
 

Alan J T

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One slot is PCIE M.2 only and one is SATA and PCIE M.2

Is your M.2 on the supported list. And is it showing up in Bios in the PCIE SATA Slot.
supp.jpg

M_1 Has to be supported by the CPU, what CPU do you have
M-2.jpg
 
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cpu: R5 3600
ssd: kingston SA2000 , the second one from the picture uve uploaded, but the 1TB version

edit: i believe the support only differs for 3.0/4.0 depending on cpu, but the ssd is a pcie3 one.
and no, it didnt show up in bios, only does so in the second slot.
 
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namklak158702ec

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I have the same question, I have the R7 3700X. Where is the info on if the cpu supports that slot?

Also, if the ssd is 3.0, is the cpu driven slot any faster than the B550 driven slot?

From the combability list from my specific MB:
PCI-E M.2WDBlue SN550 - WDS100T2B0C2280Gen31TB
 
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Alan J T

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I have the same question, I have the R7 3700X. Where is the info on if the cpu supports that slot?

Also, if the ssd is 3.0, is the cpu driven slot any faster than the B550 driven slot?
AMD Web Site and I believe all 3xx Series AMD CPU support PCIE 3 and 4
 

Alan J T

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So may be time to Contact MSI Support as it should really see it in both m.2 slots. as it is PCIE M.2 SSD
 

Alan J T

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Also, if the ssd is 3.0, is the cpu driven slot any faster than the B550 driven slot?
No as both would run at same speed as SSD only being PCIE 3
CPU M_1 Slot supports PCIE 3 and 4
the B550 chip slot M_2 Supports PCIE 3.

There may be some slight advantage to the one being controlled by the CPU But you would have to benchmark the SSD via
CrystalDiskMark
 

namklak158702ec

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No as both would run at same speed as SSD only being PCIE 3
CPU M_1 Slot supports PCIE 3 and 4
the B550 chip slot M_2 Supports PCIE 3.

There may be some slight advantage to the one being controlled by the CPU But you would have to benchmark the SSD via
CrystalDiskMark
Thanks for the tip on the benchmark. My feeling is one less transaction by the SSD being on the CPU MUST be better. If I go thru the effort to move it to the CPU slot and it works, it'll probably stay. If I benchmark, I'll report here...
Ugh, I just read on the CrystalDiskMark site this disclaimer, "CrystalDiskMark may shorten SSD/USB Memory life.". I'm a old "spinning mag disk is more reliable" guy, so this scares me. I'm guessing it's just a default disclaimer, but...
 
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Alan J T

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Any time you wright data to a SSD you shorten the life but I think you have to completely rewrite data to the SSD several thousand times. So if a 1TB SSD your looking at 1.5million TB written to it of some such number.

Read this 👉CLICK ME👈
 
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So may be time to Contact MSI Support as it should really see it in both m.2 slots. as it is PCIE M.2 SSD
ive tried, awaiting response, dont want haveing to deal with amazon return if theres some kind of beta bios or something (just updated to the latest one earlier today, but same result)

got a response to look for bent pins.
no luck again.
got told to check it in windows (so having to boot from diff drive), but as espected, nothing
 
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