Ability to adjust 3 fans? Msi GS66 12UGS

[Themazin]

Hi, wondering if its possible to adjust the 3 fans on some MSI laptops individually, or if they work automatically when adjusting the gpu fan and cpu fan profiles?

[Sparronator9999]

I've already had a couple of people wondering this. I don't think it's possible to directly control the third fan (MSI ECs do not have any space to store a third fan profile that I know of), but maybe @glpnk knows more.

@gemSquared worked around this by tweaking their default fan profiles to line up with their laptop's third fan behaviour. See their config.

[glpnk]

I've seen similar case somewhere, but 3rd fan seems to be triggered by second part of CPU or GPU fan curve with no fine tuning abilities. It will be nice if you can experiment with this. (UPD: I see link in @Sparronator9999's comment now)

You can try zeroing trigger temp of CPU or GPU (you need to find out which probably triggers 3rd fan), assuming that first column is 0 degree triggered by default, try to set 50% RPM for test, reset % afterwards. After this start modifying temps from second column and next, without restoring temps to defaults on previous rows... Just don't touch last one. If you see that 1-3/2-3 fans spins up when you zeroed temps for half columns - this might proof my theory.

But EC seems to not have separate curves for 3rd/4th fans, while can control fans. Try to figure - if this fan is controllable by main fan curves at all.

[Sparronator9999]

it probably have no overheating protections, like regular curve have

I'm not quite sure if I follow, but are you referring to the "8th" fan curve point that I don't expose to the user? (another reason is because that one doesn't have a corresponding down threshold that I could find)

[glpnk]

I've seen that older apps sometimes set whole curve to 0, except last column, so yeah. But we can also tune protections

that one doesn't have a corresponding down threshold

That's normal, because it does not need it

[Sparronator9999]

I wonder if somehow I've ended up in test mode (because of a bad EC write), as I've had it happen before (very rarely) where no matter what I do (apart from EC reset), my fan gets stuck at 0% speed.

[glpnk]

Only if you have EC dumps I can try to investigate. But one msi-ec user once tried to write FF's to all addresses. Some addresses were not reset after reboot, but it self shutdowned before whole address space was written

[Themazin]

How can I get an ec dump to send to you? Also from testing a bit and looking at msi center for the third fan rpm, it seems to vaugly match the cpu fan in the gs66, don't know about the GPU fan but I can test it. When. I set the cpu fan to zero, the second fan follows.

[glpnk]

@Themazin #96 (reply in thread)

How can I get an ec dump to send to you?

If I'm right YAMDCC have dumper

Also from testing a bit and looking at msi center for the third fan rpm, it seems to vaugly match the cpu fan in the gs66, don't know about the GPU fan but I can test it. When. I set the cpu fan to zero, the second fan follows.

Okay, seems same, so 3rd fan (because 1st is CPU, 2nd is GPU) always follows CPU fan. Would be interesting to know if it chose faster fan (CPU/GPU) to follow, but I doubt.

[Sparronator9999]

YAMDCC does indeed have an EC dumper, called ec-inspect. To use it, from an Administrator Command Prompt, cd into the YAMDCC install directory (C:\Program Files\Sparronator9999\YAMDCC), then run ec-inspect dump. To monitor changes to the EC registers, run ec-inspect monitor instead.

EDIT: ec-inspect does not depend on the YAMDCC service, so you can run it without having the service installed.

[Themazin]

Okay, seems same, so 3rd fan (because 1st is CPU, 2nd is GPU) always follows CPU fan. Would be interesting to know if it chose faster fan (CPU/GPU) to follow, but I doubt.

I will test this later and send the result in the thread.

YAMDCC does indeed have an EC dumper, called ec-inspect. To use it, from an Administrator Command Prompt, cd into the YAMDCC install directory (C:\Program Files\Sparronator9999\YAMDCC), then run ec-inspect dump. To monitor changes to the EC registers, run ec-inspect monitor instead.

EDIT: ec-inspect does not depend on the YAMDCC service, so you can run it without having the service installed.

Thanks for the help, here is the ec dump

YAMDCC EC inspector

 0x | 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
----|-------------------------------------------------
 00 | 00 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
 10 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
 20 | 00 00 00 00 00 00 00 00 0A 05 00 00 00 06 1B 43  ...............C
 30 | 02 05 00 05 00 00 50 81 6A 18 60 3B 71 02 C0 00  ......P.j.`;q...
 40 | 35 0C 3E 00 CC 0E 01 FD 2B 09 CE 3A E0 0B F8 43  5.>.....+..:...C
 50 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
 60 | 00 00 00 00 00 00 00 00 29 00 37 3C 41 46 5A 5F  ........).7<AFZ_
 70 | 64 00 00 1E 3C 41 50 55 64 00 08 07 05 05 05 03  d...<APUd.......
 80 | 00 00 32 3C 46 52 5A 5D 64 00 00 2D 3C 46 50 55  ..2<FRZ]d..-<FPU
 90 | 64 00 03 05 05 06 03 03 02 0F 78 02 0F 78 29 00  d.........x..x).
 A0 | 31 36 56 35 45 4D 53 31 2E 31 30 35 30 33 30 31  16V5EMS1.1050301
 B0 | 32 30 32 32 31 33 3A 33 35 3A 34 31 00 00 00 08  202213:35:41....
 C0 | 00 00 01 25 00 00 00 00 00 00 00 00 00 00 00 00  ...%............
 D0 | 00 00 C2 82 8D 00 05 D0 00 01 00 00 00 04 00 00  ................
 E0 | E2 00 00 CC 0E 01 00 40 00 00 00 0F 00 C2 00 00  .......@........
 F0 | 00 00 70 00 27 7F 05 00 7F 05 03 C0 00 00 00 00  ..p.'...........
C:\Program Files\Sparronator9999\YAMDCC>