For those who are interested in a view inside the Netgear 8x10GB NBaseT switch:
For noise reduction, I’ve tried to replace the fan (which is a Foxconn pva040f12m) with the Noctua NF-A4x20 PWM which has also a 12V PWM connector. However the switch is running with it but the FAN-LED on the cahsssis indicates a problem with the fan and i could observe a form of thermal throttling. I ended with adding the Noctua Fan as inlet and moved the original fan to the middle of the switch with dampers around it. I used the Y-Cable included in the Noctua Box attaching the Foxconn Fan to the 4 Pin end.