I have changed the fan to a much more silent type.
The original fan can be quiet loud.

I bought this fan after I saw a lot of YouTube what others have done:

It is a noctua NF-A8 ULN 80 mm premium fan.
The ULN variant was the cheapest, I bought it at CompuMail and payed 125 dkr for it.

The original fan still in place:

The old and new fan:

I had to make a small cut for the wire, and I cut the yellow wire, only the red and black are needed:
     

I spliced the wire from the noctua fan with the connector from the old fan:
     

Now it looks like this:

The result is fantastic, I barley can here the fan so I am very pleased.
I will now test if the rig is running hotter than before.
I never had any temperature rise when running FT8 and other data modes.