I do have the X470D4U and, with most Noctua's at least, you can orient the fins/fans in either direction to make up for the socket rotation due to the way their mounting mechanism works. Granted, I'm using a rev of the board that didn't come with a glued backplate (just regular adhesive).
In the case of the NH-L9x65 SE-AM4 I was using, this didn't leave enough space for the first (actually second) DIMM slot to be used:
https://forums.servethehome.com/ind...yzen-am4-server-motherboard.23638/post-233613
From the extra spacing the X570 model shouldn't have this problem.
Nice find on the ASRR heatsink nago - I'd be very surprised if it was
only rated for 65W CPUs even if there's fans blowing on it and the spec stipulates that's its passive limit; indeed, I don't think you could fit a bigger heatsink inside a 1U server. I'm reasonably sure it'd be able to support beefier CPUs as long as there was good directed airflow over it. ASRR themselves support using the
1U4LW-X470 with a 3950X in it, as you can see from the picture that's with five 40mm fans and a shroud.