On 3/4/24 16:41, Guenter Roeck wrote:
+
+ min-rpm:
+ description:
+ Min RPM supported by fan.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ maximum: 1000
I can't say with certainty that it's not, but are we sure 1000 is low enough? Looking at just what I've got on hand, an 80mm fan I have will run steadily at about 1500RPM, and I'd assume larger ones (e.g. 120mm) could potentially go significantly lower...
I have seen fans which run stable at < 400rpm.
One of my systems right now has:
fan1: 732 RPM (min = 0 RPM)
fan2: 0 RPM (min = 0 RPM)
fan3: 586 RPM (min = 0 RPM)
fan4: 472 RPM (min = 0 RPM)
fan5: 480 RPM (min = 0 RPM)
Those are 80mm fans. A quick check shows that various Noctua fans have a
minimum speed of 300 rpm. So 1000 is indeed a bit high for the minimum speed.
No, wait, that is the _maximum_ minimum speed. Got me there.
So, there is Noctua's NF-A4x20 PWM with a minimum rotational speed of 1,200 RPM.
If I interpret
https://www.mouser.com/datasheet/2/471/SanyoDenki_San_Ace_40LG28_E-3198440.pdf
correctly, it lists some fans with a minimum speed of 7,500 RPM.
Guenter
