francisaugusto
Contributor
- Joined
- Nov 16, 2018
- Messages
- 153
The best answer might be to replace the current CPU fan with something quieter and let the BMC control the fan speed as the CPU temp varies.
I just did it. Got a Noctua A6x25 PWM, and replaced the original Supermicro cooler.
It wasn't necessary to unscrew the whole heatsync. It was a hard job to unscrew the cage, but it worked. The A6x25 PWM fitted perfectly - same mounting hole.
I am just not sure it was worth it, though. When the fan is at max speed, It's the same noise, or maybe a tiny bit quieter, than when I had the supermicro fan running at 2200 rpm using
Code:
ipmitool -H 192.168.1.80 raw 0x30 0x70 0x66 0x01 0x00 0x2
Now, with the Noctua fan, when I select "optimal" and restore the full cycle, (0x64), I get 1200 rpm and an average of 56º C. And not so quiet as I thought.
I am a bit disappointed, I must say. Not the quietest machine - maybe a bit quieter than when controlling the supermicro fan, and now it runs warmer. I am almost considering going back to the Supermicro fan. But the biggest advantage is that I don't need a script to control the fan, it seems the ipmi is oscilating the fan as the degrees go up and down.