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atrofac

A GUI, a library and a command line application to control the power plan, and the fan curve (CPU & GPU) of Asus Zephyrus G14 devices (might also work with other devices that use the Armoury Crate Service). Fanless mode is possible as long as the GPU & CPU temperatures are not too hot (even on battery).

WARING / DISCLAIMER

USE THIS AT YOUR OWN RISK. MANUALLY ADJUSTING FAN CURVES CAN BE DANGEROUS (MIGHT BREAK YOUR DEVICE). FRANKLY I HAVE NO IDEA WHAT I'M DOING SINCE THERE'S NO DOCUMENTATION FROM ASUS ON HOW TO MANUALLY ADJUST THE FAN CURVES. ATROFAC TRIES TO PREVENT YOU FROM SETTING A DANGEROUS FAN CURVE (THE SAME WAY ARMOURY CRATE DOES).

State / Changes

Has been in use for more than a month (end of may 2020 - early july 2020) and works with some minor flaws (see reddit for details and read this documentation). This is my G14 model: firmware GA401IU.212, Ryzen 7 4800HS, GeForce GTX 1660 Ti. According to reddit it seems to work for other users too (and even other notebook models): https://www.reddit.com/r/ZephyrusG14/comments/go16hp/fanless_completely_silent_on_battery_manual_fan/.

Changes : CHANGES.md

Getting started (end user documentation)

You most likely want to use the atrofac GUI (if not, see here for the command line version: ADVANCED.md). It's a simple system tray application that runs in the background.

System tray

Step 1: Download

Download the binary: atrofac-gui.exe.

Step 2: Autostart

You usually want atrofac to be started when your computer starts. You can also skip this step and start the application manually.

Press Windows-Key + R. This opens "Run":

Run

Enter shell:startup. Now move the "autrofac-gui" to the Start-up folder. Done.

Run

Step 3: Start the app

Start the app and you should see a new icon in the system tray; the app is running.

Screenshot

Step 4 (optional): Reduce power drain

To make sure the G14 stays fanless, you have to make sure the device does not get too hot / drains too much power. There's a good article, read it and apply the suggestions: https://blog.remjx.com/how-to-fix-thermal-battery-life-issues-asus-zephyrus-g14-g15-2020/. Things I did:

  • Updated the Bios and all drivers.
  • "Disable CPU Boost on default power profile": I set "Processor performance boost mode" to "Disabled" on battery and to "Efficient Enabled" when plugged in.
  • Removed "GameFirst".
  • Set "Switchable Dynamic Graphics" to "Force power-saving graphics" on battery. (in Windows "Edit power plan").
  • Disabled all windows background apps (it should be enough if you just disable those that utilize the NVidia-GPU). (see "Windows Settings > Background Apps").

This is the result:

About 4 watts idling with minimum brightness:

Run

About 7.6 watts idling with maximum brightness:

Run

Note: This are the values when idling... As soon as you do something (even just opening a web browser), values will increase. If your values are within +/- 20% everything is ok.

Step 5 (optional): Remove Armoury Crate & Service

This step might be a bit controversial. I removed those two apps:

  • Armoury Crate
  • Armoury Crate Service

Why? Armoury Crate overwrites the settings made by atrofac on certain occasions (when waking up, after a restart, when plugging in, on unplug). To make sure this does not happen, I just uninstalled Armoury Crate & Armoury Crate Service. I suggest doing that too - you can re-install those apps later if this does not work for you.

Alternative 1

Keep Armoury Crate and manually re-apply the desired plan in atrofac every time Armoury Crate overwrites the settings made by atrofac.

Alternative 2

Set refresh_interval_sec to a value (about 30-120 seconds). See below for more details. I wouldn't advise it: Why? Every time atrofac (and also Armoury Crate) applies a power plan, there's a short peak in power consumption (up to 25 watts). I can't really tell the impact on battery life - the 25 watts drain could just be for a millisecond - but it's long enough to be visible in BatteryBar. (technical detail: unfortunately I have not yet figured out how to read out the current power plan - if this was possible I could apply the power plan only when something has changed).

Optional: Change settings

atrofac comes preconfigured with 6 different profiles ("Silent (fanless)", "Silent (low-speed fan)", ...). If you want to see what those profiles do - or change them, click on "Edit configuration"; the configuration is just a yaml file. After saving the file you have to click "Reload configuration" to apply the changes. If you break the configuration file, the app won't start up anymore. Don't worry: Just delete the broken configuration file and atrofac will create a new one. The file can be found here (note: the folder AppData is hidden by default):

C:\Users\<YOUR_USER_NAME>\AppData\Roaming\atrofac_gui_config.yaml

An entry for a plan looks like this:

  - name: Silent (Fanless)
    plan: silent
    cpu_curve: "30c:0%,49c:0%,59c:0%,69c:0%,79c:31%,89c:49%,99c:56%,109c:56%"
    gpu_curve: "30c:0%,49c:0%,59c:0%,69c:0%,79c:34%,89c:51%,99c:61%,109c:61%"
  • name: The name, obviously.
  • plan: One of silent, windows, performance, turbo.
  • cpu_curve: CPU fan curve, see ADVANCED.md.
  • gpu_curve: GPU fan curve, see ADVANCED.md.
  • refresh_interval_sec (optional): Armoury crate will overwrite the changes made by atrofac eventually (usually when waking up from sleep; when going from AC to DC or vice versa). So atrofac will periodically apply the settings every n seconds. It has been renamed from update_interval_sec to make sure it's gone when somebody updates the app and keeps the old configuration. Why: see "end user documentation".
  • refresh_on_apm_resume_automatic (optional; default value is true): If this is true, atrofac will re-apply the plan after resuming from sleep or hibernation. You usually want this to be true. (technical detail: see Win32 API PBT_APMRESUMEAUTOMATIC).

You can also omit cpu_curve and gpu_curve in that case the default fan curves (as defined by Asus) are used.

Binaries

There's no CI yet, but there are prebuilt binaries:

Advanced

See ADVANCED.md if you need more information such as:

  • The command line version of this tool.
  • Building.
  • Technical information.
  • Fan-curve details.

Logs

Log files are written to C:\Users\<USERNAME>\AppData\Local\atrofac_logs. These files are deleted automatically after a few days. There are two options in the config file (top level section) related to logging: