Unifi US-16-XG Fan Mod
Unfortunately, Ubiquiti has equipped the US-16-XG with rather loud 30mm fans. Since that was too annoying for me, I replaced the fans - inspired by this post: https://blog.pcfe.net/hugo/posts/2020-03-06-us-16-xg0-fan-mod/
I installed 40mm "Cooltek CT4010BW" fans. This requires adapters, which were created bei Dave Butler and can be downloaded as a 3D models https://www.thingiverse.com/thing:4143421.
Other fans that should work are the Noctua NF-A4x20 FLX.
Pay attention to his photos, they show the correct orientation of the adapters
If you want to mod a Unifi US-16-150W, you need shorter adapters. They are available here: https://www.thingiverse.com/thing:4970676
Technical data of the Cool tek CT4010BW fans
| Feature | Value |
|---|---|
| Max speed | "4000RPM" |
| Connector | "3-pin" |
| Air flow rate | "9.30 m³/h" |
| Noise level | "12.8 dB" |
| Power consumption | "0.48 W" |
| Voltage | "7 - 12 V DC" |
Result
The switch runs much quieter with about the same temperatures.
To assess the modification, here is some data from before the mod:
Here i already used “Low-Noise” Adaptors as a first attempt to make the switch less noisy. They simply include a resistor in a short adapter cable to reduce the voltage to the fan. IIRC i used 47Ω LNAs. I never recorded the temperatures with the original fans running without restriction.
Ambient temperature: 25°C
Uptime: a couple days
Unifi-Switch-16XG-US.6.5.59# swctrl env show
General Temperature (C): 53
Temp Sensor Temp (C) State Max Temp (C) Alert Temp (C)
=============== =========== =============== ============ ==============
PHY 53 Normal 56 75
REAR 48 Normal 51 75
CPU 47 Normal 50 75
Fan Duty Level: 61
Fan Speed Duty level State
=============== ========== ========== ===============
FAN-1 6569 61 Operational
FAN-2 6467 61 Operational
New temperatures a few days after the installation of the new fans
Ambient temperature: 25°C
Uptime: a couple days
Unifi-Switch-16XG-US.6.5.59# swctrl env show
General Temperature (C): 56
Temp Sensor Temp (C) State Max Temp (C) Alert Temp (C)
=============== =========== =============== ============ ==============
PHY 56 Normal 57 75
REAR 48 Normal 49 75
CPU 47 Normal 49 75
Fan Duty Level: 63
Fan Speed Duty level State
=============== ========== ========== ===============
FAN-1 3385 63 Operational
FAN-2 3524 63 Operational