AB350M Pro4 and Dual M.2

Nicolas, your Kingston A2000 1Tb is a PCIe SSD, which is incompatible with the M2_2 socket you are trying to use it with. Per the user guide M2_2 is compatible with SATA SSDs only.

Jake

In BIOS Advanced page select Storage Configuration, enter.
Make sure SATA is enabled, and I take it Sata Mode is AHCI.
On the same page, check that nothing is detected next to SATA3_3.
Also worth a try temporary putting your Kingston SSD into primary M.2 slot to see if SSD is not faulty. And for a change plug Samsung SSD into secondary slot afterwards. Do it one by one. Keep in mind secondary M.2 slot is not bootable, so you can boot Windows out of SSD placed in it

Nikolas wrote: Hello.I have AB 350nm pro 4 mobo.I have one ssd samsung 250 evo in m2_1 slot and i want to put another one Kingston A2000 1Tb.Did anyone know if is that possible?Because the m2_2 slot it doesnt work.thank you and excuse me for my bad English language!

Specs mention this:
M2_2 and SATA3_3 share lanes. If either one of them is in use, the other one will be disabled.

Make sure you don't have anything plugged in into your SATA3_3 connector.
Your motherboard has 4 SATA connectors on right hand side. Check your Manual page 8, which shows which one of the connectors is Sata3_3. If anything is plugged into it, disconnect and use other 3 ports.

Hope this helps

There is a second M2 socket, M2_2. It should be located behind PCIE3. Whether or not you can use it for another M@ SSD depends on the SSD. It appears that M2_2 is SATA only, plus it shares resources with connector SATA3_3. Check your user manual or quick installation guide.

Jake

Hi.
I have an AB350M Pro4 with a M2 SSD 256 GB and I want to add one more M2 SSD 512 GB. Is that possible? Are there available slots on the motherboard or I have to buy a 2.5???