Acoustic Noise and Fan Speed

Switch Model Bystander Sound Pressure (dB) Weighted Sound Power level (B)
5720-24MW 48.8 6.3
5720-48MW 55.1 6.7
5720-24MXW 48.5 6.3
5720-48MXW 54.7 6.7

Note: All ports link up with full traffic, 50% PoE Budget Load, Dual 2000W PSU, 25°C

Table 1. 5720 Fan Speed and Power Consumption
Fan Speed Fan Module RPM (typical) Power
Inlet Fan Outlet Fan Typical
Full (100%) 22500 (typ) 19500 (typ) 12V*2.3A=27.6W
Low (30%) 7000 (typ) 6100 (typ) 12V*0.2A=2.4W per module

* Some units are equipped with (3) fan modules, while others are equipped with 4. Total fan power is equal to the number of installed fan modules multiplied by the fan power for each module.

Fan Speed and Temperature Variation

The speed of the fan increases only when the temperature of the device increases. Fan speed is not dependent on any fan failures.