What’s the motherboard model? Which slot are you attempting to use? Is it a physical X16 slot with only a X8 connection? Do you have any other slots available for M.2 drives?

The ideal platform will be hardware agnostic

Captain Janeway

They saw that Bernie was within a hare’s breath from becoming the President, freaked the fuck out, and pulled the plug. They did this entirely out of fear of losing control. So no the DNC doesn’t care about our collective spirit or even whether or not we have a choice.

Which direction were you pointing?

I found this to be more or less impossible on my AM4 platform. The AMD RAID kernel module didn’t work under any distro. Fire up an Ubuntu live environment and see if you can detect and read the contents of your Windows environment. That should give you a good sense for what is possible. Otherwise I recommend installing to a separate NVME as I have.