M2 slot 2 and hdd not working on new motherboard

[Gilsa]

I recenly bought an msi mpg b550 gaming plus, to pair it with a ryzen 7 5800x. Also bought a new psu, the msi mag 750w. For some reason when I placed my m2 ssd on slot 1, the one with the lightining gen 2, the pc didnt get any image. But when I plugged it on slot 2, the pc works normally. Also, I cant get any hdd to power up, currently have 1 m2 ssd and one 2.5 ssd, working correctly, but for some reason the hdd doesnt power up, already tried two different ones and neither one powers up. Am I plugging the wrong cables or is just an issue with the motherboard?

m2 ssd: Samsung Evo 960 256 GB ( mz-v6e250) > Only works on m2 slot 2
HDD : Seagate 1tb 7200rpm (st1000m003) > doesnt power up
2.5 ssd: crucial 2.5 ssd 256 GB > works fine

[veeg]

Hello

Let me tag a member for more help..

@xrobwx71

[xrobwx71]

Lets get a Speccy from you.

[HEADING=3]To publish a Speccy profile to the Web:[/HEADING]
[ol]
[li]In Speccy, click File, and then click Publish Snapshot.[/li][li]In the Publish Snapshot dialog box, click Yes to enable Speccy to proceed.[/li][li]Speccy publishes the profile and displays a second Publish Snapshot dialog box. You can open the URL in your default browser, copy it to the clipboard, or close the dialog box.[/li][/ol]

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Looking at your motherboard manual page 5, the #1 slot supports PCIe 4.0 the #2 slot supports PCIe 3.0. It states the #1 slot runs from the AMD processor and the #2 slot runs from the AMD B550 chipset. It’s possible you don’t have the chipset driver installed correctly or not at all.

Lets look at the Speccy before moving forward.

[Rustys]

Following instructions on other forums