Question MSI X570-A PRO

Aug 13, 2023
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Hi. My motherboard have 2 m.2 slots
And all all of them have ✓on PCI-e
One of slots m.2 dont recognise my ssd
Samsung 970 evo plus
Second slots works great
What can i do, to know is it correct or no

Many thanks for everyone, who trying to help
 
could be just he cpu on pcie 3.0 but the motherboard support 4.0
nothing in bios to change to 3.0?
Hm, maybe i need to try buy ssd with PCI-e 4.0?
How i can see my cpu support only 3.0😩
But why the same m.2 ssd not visible on all 2 slots?
And if my cpu support only PCI-e 3.0 he cant work with 4.0?