jyavenard
Patron
- Joined
- Oct 16, 2013
- Messages
- 361
So far, I've tried with 3 PWM fans or controller: they all behaved the same... as soon as the speed goes below the threshold (450rpm) then the other fans start going full speed (my guess that's to compensate) and the fan in question goes full speed too.
It does the same thing when you remove one fan while the machine is running, the other fans go full speed, until you plug back the fan (the fans in the supermicro chassis are hot swappable)
the noctua fans only works properly when the fan mode is set to full speed.
Or, like I mentioned earlier if the CPU temperature is high enough so the speed of the noctua is over 450rpm.
When I had the CPU at 68 degres, the MB put the fans at 900rpm and they work just fine at that speed.
The issue is whenever the speed fall below the threshold.
Googling shows that this is a common behaviour with the supermicro boards.
So long as the fan run at quite a high nominal speed: things are fine. As when running at a lower setting it will still be above the minimum threshold.
the noctua I have, have a maximum speed of 1800rpm, when the supermicro board makes them run at low speed: if it goes below their set minimal threshold: this is when problem starts.
Problem, it seems the supermicro ipmi doesn't seem to let you change the threshold value: they are hard set.
I seriously doubt noctua is the kind of fan manufacturers that wouldn't follow the specs....
It does the same thing when you remove one fan while the machine is running, the other fans go full speed, until you plug back the fan (the fans in the supermicro chassis are hot swappable)
the noctua fans only works properly when the fan mode is set to full speed.
Or, like I mentioned earlier if the CPU temperature is high enough so the speed of the noctua is over 450rpm.
When I had the CPU at 68 degres, the MB put the fans at 900rpm and they work just fine at that speed.
The issue is whenever the speed fall below the threshold.
Googling shows that this is a common behaviour with the supermicro boards.
So long as the fan run at quite a high nominal speed: things are fine. As when running at a lower setting it will still be above the minimum threshold.
the noctua I have, have a maximum speed of 1800rpm, when the supermicro board makes them run at low speed: if it goes below their set minimal threshold: this is when problem starts.
Problem, it seems the supermicro ipmi doesn't seem to let you change the threshold value: they are hard set.
I seriously doubt noctua is the kind of fan manufacturers that wouldn't follow the specs....