About mac fan Ideal RPM

You are reading "ideal" into this situation where it is not warranted.

Your Mac measures the actual temperatures and adjusts fan speeds to higher RPM when additional cooling is needed.

There is no one ideal fan speed, except Zero when your Mac is powered OFF. Otherwise, the software adjusts fan speeds about ten times a second, and most user fiddling does not do a better job than the computer itself can do.

diwanjana wrote:

I used *Mac fan control* to check my macbook pro 2017 fan rpm. And It shows 0RPM when ideal. But It shows the range of rpm is 1200-7200.

But when I used my mac for heavy task, far rpm rised.

01. Is it ok if mac fan rpm is 0 when ideal?

02. Can *mac fan control* trust? Is it harm if I control my mac fan, using Mac fan control ?

What exact macbook pro 2017 is this?

You would have to verify the version of "Mac fan control" is compatible with your exact macOS...

You can see from the Terminal.app if the following command line works for you depending on your macOS, copy and paste:

sudo powermetrics -n 1 --samplers smc | egrep -i "FAN|CPU die|GPU die"

You can always Try resetting the SMC https://support.apple.com/en-us/HT201295

if you think you have an issue

Run an Apple Hardware Test:

https://support.apple.com/en-us/HT201257

What will keep your Mac cooler is using Turbo Boost Switcher to disable processor Turbo Boost. Turbo Boost is a feature that allows one lightly loaded processor to run at faster and faster speeds until it is on the verge of overheating, then throttles itself back from the abyss. It is marketing specsmanship nonsense for most users, and does not make a tangible contribution to processing power for most Applications (except possibly compiling).