Written by I bought a Mikrotik CCR1009-8G-1S-1S+ several years ago and use as my main router at home. It was relatively quiet with lower load when put on a shelf, but after I move to the new apartment and put it into a network cabinet, the noise was much higher especially in hot summer. So I decided to replace the factory fan with something quilter.
My first choice is Noctua fans, Mikrotik CCR1009-8G-1S-1S+ use two Chiefly-Choice 40x40x20mm fan but Noctua was only offer 40x40x10mm fan then. And it was not looking good as the 10mm fan will leaving a gap between fan and shield.
And now Noctua offer 20cm fan as model NF-A4x20, and I bought two 3-pin, 12volte version for replacing the stock Chiefly-Choice fans. Note Mikrotik CCR1009-8G-1S-1S+ only support two 12v fan without PWM, not all Noctua 40mm fan fit this requirement.
| Chiefly-Choice CC 4020B12M | Noctua NF-A4x20 FLX | |
|---|---|---|
| Bearing | 2Ball | SSO2 |
| Max RPM | 7000 | 5000 |
| Voltage (V) | 12 | 12 |
| Current (A) | 0.08 | 0.05 |
| Input Power (Watts) | 0.96 | 0.6 |
| Airflow (cfm / m³/h) | 8.60 / 14.61 | 5.53 / 9.4 |
| Static pressure (mm H2O) | 5.1 | 2.26 |
| Noise (dbA) | 28.50 | 14.9 |
| Connector & pin-configuration | 3-pin | 3-pin |
Compare stock Chiefly-Choice fan and Noctua fan, the Noctua is quilter and running with lower RPMs and less airflow, however my router usually run on less and 30% load (even VPN connection and 20+ rules), Noctua should have enough pressure and airflow for my use case. If your router is running with high load, it’s better to use high airflow fans. But if you always full loaded an CCR1009-8G-1S-1S+ router, they are likely placed in an office environment or as a test device, so the noise should be an issue for you.
The fan replacement is easy, remove the stock fan, and replace then the Noctua one.
Be careful, the 3-pin header on board does not have fool-proof design, so do not plugin in wrong way.
The finish job.
With 16w power consumption, and 26C ambient temperature in network cabinet, the fan manage to keep CPU temperature around 50-51C – very close to stock fan, with much lower noise.
[admin@CCR-1009] /system health> print
fan-mode: auto
use-fan: main
active-fan: main
cpu-overtemp-check: yes
cpu-overtemp-threshold: 100C
cpu-overtemp-startup-delay: 1m
voltage: 24.2V
current: 670mA
temperature: 31C
cpu-temperature: 51C
power-consumption: 16.4W
psu1-state: ok
psu2-state: ok
fan1-speed: 3647RPM
[admin@CCR-1009] /system health>
Need Not to Know 