X870E Nova WiFi A6 POST code freeze

Hi gannik. First of all, you will want to remove the NVMe drive then update to the
latest available BIOS for your board, I believe it's 4.43 currently. Once complete
enter the BIOS and restore system/factory defaults then shut down the system and
reinstall your NVMe drive.

See if that resolves your issue. Boot issues are quite common on AM5 systems and
most of the more recent BIOS updates (since 4.03) have been to improve this.

Let me know if that gets you up and running.

Are you checking under Advanced/Storage Configuration£

1. Make sure the M.2 drive is properly seated in it's socket. (in your case make
sure you install your NVMe in socket M2_1 as it is the fastest available on your
board.)

2. Under "Boot options" in your BIOS make sure CSM is set to disabled. Most NVME
drives require this setting to be disabled. CSM = Compatibility Support Module
and it exists for old, legacy hardware. Almost no one uses any hardware that
needs it anymore.

If you have another drive you can use and install an OS on you can try this:
Go into windows (assuming you have another boot drive installed) and check
in "Disk Management" to see if your drive is showing there.
a. Open Disk Management: Right-click the Start button (or press Windows Key + X)
and select Disk Management.
b. Initialize the Drive (if new): If the drive is brand new, an "Initialize
Disk" window will automatically pop up. Select GPT (GUID Partition Table) as it
is the modern standard, and click OK.
c. Create a Simple Volume: Look at the bottom of the window for your new disk.
It will be marked with a black bar indicating "Unallocated" space. Right-click
this unallocated space and choose New Simple Volume.
d. Specify Volume Size: The wizard will guide you; click Next. You can specify
the size in megabytes (MB) or leave it at the maximum default to use the entire
drive.
e. Assign a Drive Letter: Click Next, and assign your preferred letter (e.g.,
D, E, or F) to the drive.
f. Format the Drive: Select NTFS as the File System, leave the Allocation unit
size to Default, and give the drive a name in the "Volume label" box (e.g.,
"Media Drive"). Ensure Perform a quick format is checked.
g. Finish: Click Next and then Finish. The status will change to Formatting,
and it will then be accessible in File Explorer.

NVMe drives sometimes don't show in the BIOS until they have been set up.