[Bug 105718] amdgpu reported fan speed looks too high (dual fan Sapphire Pulse Vega 56 and Sapphire RX 5700 XT)

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Comment # 7 on bug 105718 from
(In reply to Shmerl from comment #5)
> Actually, I've noticed another similar issue. I just got Sapphire Pulse RX
> 5700 XT. It's also dual fan.
> 
> According to this:
> https://www.gamersnexus.net/hwreviews/3498-sapphire-rx-5700-xt-pulse-review
> 
> The top level of fan rotation (at high load and more performance BIOS
> setting) is around 1570 rpm. While sensors report that max is 3200 rpm for
> me!
> 
> And something like 50% load (of the fan) is shown as around 1600 RPM!
> 
> So I'd say something is definitely off. It's almost like values from both
> fans are added up, instead of showing actual one.

You could use UPP (https://github.com/sibradzic/upp) so see what your the
powerplay tables report is the maximum for fanspeed. On the MSI Evoke 5700 XT,
mine reports a FanMaximumRpm of 3200. I believe in the case of the Evoke, that
some benchmarks have shown it can get near 3200 RPM at max speed.

I don't know if the driver impacts the values here, or if this is strictly
based on the BIOS. But it might be helpful to see if that max matches what the
sensors are reporting.


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