I added a second M.2 with PCIe x4 card to B450 Tomahawk Max but it doesn't show up in disk management or bios and the card is lighting up.
How can i fix it?
What model M.2 drive?
Can you provide link to your PCIe x4 M.2 adapter card?
What slot did you install it in? Guessing - second PCIE x16 slot. Right?
Note - second PCIE x16 slot runs in PCIE 2.0
Show screenshots from
Device Manager - disk drives and storage controllers sections expanded,
Windows Storage Spaces (Control Panel\Storage Spaces).
If new drive appears in Storage spaces, then remove it from pool and delete pool.