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Raptor Computing Systems Hardware => Mod Zone => Topic started by: pocock on October 08, 2020, 04:42:59 pm

Title: is Talos II overclocking the fan?
Post by: pocock on October 08, 2020, 04:42:59 pm

ipmitool tells me that the PWM fan I put in the rear of my case is running at 1800 RPM

Noctua rates it for 1500 RPM +/- 10%, that suggests that 1650 RPM is the maximum

PWM, by definition, can't overclock or overvoltage anything, it simply increases the pulse width up to the point where pulses are 100%.  You can't PWM over 100%

Is the fan simply running outside the spec or could this be a reporting error?

Title: Re: is Talos II overclocking the fan?
Post by: Borley on April 08, 2022, 07:05:28 pm

Some of these fans include a resistor in-line plug for a lazy man's quiet operation mode. If it's one of those, would that impact the PWM measurement?
(https://electronicmethods.blogspot.com/2017/03/noctua-120mm-fan-testing-nf-f12-pwm-7-x.html)