Looks like you have to remove the Cooler from the PCB to get to the fans so depending where you live RMA to advios Warrant problems of replace and risk damage to the card that will not be covered by warranty. As if in USA you have the right to repair but if you break it doing that repair it is not going to be covered by warranty. You will also most likely have to get the FAN of MSI as there's not much chance of there being ones avail for sale from dealers yet.
The shroud and fans come off from the front without needing to remove the cooler. I attempted it today and disassembled the fan and attempted to push some compressor oil into the bearings but they are still making noise. The good news is the fans are the same they've been using for years with part number pld10010b12hh so I can buy old stock fans and replace the fan blades on new fans or just replace the bearings at a minimum
That makes it easier then now just need to get the replacements. Should really order a set for mine as I prefer to have that kind of stuff on hand and not have to wait over a week for a delivery to be done.
Sadly I found upon arrival that one fan branded PLD10010B12HH is not the same as another. Entirely different sized fan that didn't have bearing that could be removed and used in the 3080's. In fact I'm not sure how they could call it a ball bearing unit.
So looks like you will need to get directly from MSI then I have the same problem Checked mine and while listed the fan shape in the pick did not quite match. Will have to Send the company a Email. to find a supplier.
Somehow I do not see speed being a problem is not like your GPU fan is going to go over 3.000rpm let alone 50,000rpm