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B660m pro as cannot set fan below 1800 rpm

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yeah!!! View Drop Down
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    Posted: 19 Sep 2022 at 10:47pm
Sorry, My English is pretty bad
I have a main B660m pro as with fan intel gen 12 RM1 https://www.intel.vn/content/www/vn/vi/support/articles/000089190/processors/intel-core-processors.html
I see fan works by manufacturer 600<fan<3150
But my main limited cannot set below 1800 rpm, i try setting in BIOS failed, i used plan soft A- Tuning, it is same result BIOS
https://anh.moe/i/wFXwS
https://anh.moe/i/wFzQV
https://anh.moe/i/wF1x6
https://anh.moe/i/wFske
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threadzipper1957 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote threadzipper1957 Quote  Post ReplyReply Direct Link To This Post Posted: 20 Sep 2022 at 10:38pm
I checked the pictures you atatched, but noticed, the CPU temperature is only 36 degrees.
As far as I now, nothing happens below 40 degrees.
You probably have a 4 Pin PWM fan, which is common for Intel
now I will bore you with some technical info
3 pins fans layout
Pin
1 = +12 volt variable
2 = - (ground)
3 = RPM sensor
The speed is regulatyed by changing the voltage on Pin1

4Pin fan
1 = +12Volt FIXED
2 = -
3 = RPM sensor
4= PWM
Here 12Volt is fixed, and the frequency on pin 4 sets the speed

In fact a 4 Pin fan is basically the same as a 3Pin, but inside the fan there is some electronics that interpretes the PWM sighnal and changes the voltage
Intel fans, do not have the best reputation, and some aftermarket manufacturers go way above the intel specifications, when it comes to the pressure they apply onto the CPU, and can cause a socket to bend.
The only brand that doesn't, that I know of, is Noctua, and the besty coolers are the topflow, where the fan is lying on top of the CPU, blowing down
https://ncc.noctua.at/motherboards/model/ASRock-B660M-Pro-RS-5533
Personally I prefer the https://noctua.at/en/nh-l9x65, which according to Noctua is more than capable cooling this CPU, they also are the most silent on the market, and have up to 6 years warranty, as far as I know
Kind Regards
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yeah!!! View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote yeah!!! Quote  Post ReplyReply Direct Link To This Post Posted: 21 Sep 2022 at 12:03pm
is my main bug ???
or is my fan bug ??
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