Thank you, this is helpful info! I've messaged them on AliExpress asking for the full specs of the fan, I hope they'll give me something.I didn't see any listing selling the N355 variant, maybe they will list it once it is available. Possibly a supply issue.
The fan is PWM so it isn't always on and doesn't get loud enough to be annoying for me...
That being said, I only had it on near my server so YMMV if you put it in your office.
The fan header is a JST 1.25mm 4pin. I'm not sure if the pinout is the same as PWM but you could get a JST 4pin to PWM adapter and repin it to use a Noctua fan.
I'm not sure about the fan voltage as the fan had no specs, probably 12V? Could ask qotom support and they should answer.
Worst case is you cut the fan header and buy a 4pin JST w/ wires and solder it on your replacement fan.
The N355 and N150 (Twin Lake-N) versions are now listed on AliExpress but the thing is still marketed as "fanless".
