How to programmatically control the number of fan revolutions in a Samsung laptop?

Question

Samsung

Hello. Samsung NP305E5A-S01UA laptop with Windows 7 Professional x64 installed. The fan speed must be manually controlled. Programs like SpeedFan have no effect. In Bios'e the "Fan control" function is not provided. However, using the Easy Settings program (downloaded from the official Samsung website), you can go to the so-called. "quiet mode" of the fan operation (this is where the cooler control functionality ends). So, there is still a loophole with which you can set the number of fan revolutions manually.
The last hope was on NoteBook FanControl (the configuration of which is described in detail here ), but the desired configuration did not turn out to be.
In Read & Write Utility v1.6.5.
there was a hint of this loophole.
Below is a screenshot of this program (embedded controller tab).

If you change the value of the red register, the value of the gray register will change, thereby changing the number of revolutions of the cooler. But this only works for a couple of seconds, after which all values ​​return to their original form. When you turn on the quiet mode in Easy Settings, the green register changes its value from 00 to 03, and the gray one, as a result, takes on the value FF at temperatures up to 55C. Manual editing of gray and green cells does not give any effect.
Perhaps someone faced a similar problem. Surely there is a register, by changing the value of which you can switch to manual fan control. Or it is possible to somehow "deceive" the automatic control of the fan using a temperature sensor. Or is there a ready-made solution in the form of a program.
In general, I will be glad to any sensible advice :)

Answer 1

As I wrote on the IXBT forum: [Notebook model Samsung NP550P5C - S02]
Turn off the "white" PWM at the cooler, thus the speed will be constantly fixed, at maximum speed. Of course, after you disconnect this wire, the fan will not spin before starting your laptop, but do not be alarmed, but wait until the laptop warms up to 40 degrees. The fan will automatically start at maximum speed. I hope it helped all Samsung owners. Also, this method may be suitable for other versions of Samsung. I'm waiting for feedback or questions about this work :)
Here are the pictures in the idle mode of the laptop, without any additional equipment, stands, etc. =)

Answer 2

I have a samsung np305v5a. Asked the same question as you. I didn't want to cut the wire. I had to dig into Read & Write Utility and NoteBook FanControl.
After much torment, I figured out that you can set the CPU temperature to static at 45 degrees (here you need to test every ten degrees), and the cooler will try to cool the CPU to <40, thus, it will work at maximum speed all the time

Answer 3

As far as I know, on the example of Acer laptops, there is no fan control in laptops. There is a threshold value, say at 50C, after which the fans start to work. This threshold value is hardcoded in the BIOS, except for patching the BIOS, changing it will not work, because the original value of the parameter at 50C% will always be restored
if silence is needed, in the power settings there is an option "maximum processor state" By setting it to 50%, you can lower the processor frequency and heat. Performance will naturally drop.
Also cleaning, replacing thermal paste, cooling pads, but this is understandable, I guess.

Answer 4

It works on the Samsung np370r5e (cut the white wire, the speed went up but pulsated ... at first it pissed me off)

Answer 5

Notebook model Samsung NP350V5C - S0URU cut the yellow switch on the cooler, now it does not turn off and overheating does not threaten. Thanks for the replies guys.

Answer 6

there 4 pins go to the fan, but bad engineers put 3 pins, solder a small wire and connect the 4-pin fan itself to the 4th pin.
And there will still be a problem in the bios, but in the case of a vend, just a driver from Samsung installed.
Linux has more problems because the bus is readable but the BIOS does not send the necessary signals.
If another revision of the laptop and tire names didn’t help, the signal and restore the track
, that’s all.