How to Install SteamOS on ROG Ally X: Complete 2025 Guide

Why Install SteamOS on the ROG Ally X?

The ROG Ally X is one of the most powerful Windows-based gaming handhelds on the market, but Valve’s SteamOS offers a compelling alternative: a console-like interface purpose-built for gaming, better battery efficiency, and a distraction-free experience. Installing SteamOS on the ROG Ally X unlocks the same polished Game Mode that Valve ships on the Steam Deck, while keeping your Windows install safely intact on a separate drive or partition.

In this complete 2025 guide, we walk through every step — from downloading the SteamOS recovery image to configuring suspend/resume and getting your controls mapped correctly.

What You Need Before You Start

• ROG Ally X (this guide also works on the original ROG Ally)
• USB-C hub or dock with at least one USB-A port
• USB drive (16 GB+) — will be wiped during setup
• Keyboard and mouse (needed briefly during installation)
• MicroSD card (optional) — for extra storage after install
• Internet connection — Wi-Fi is fine

Backup anything important on your ROG Ally X before proceeding. If you’re installing SteamOS to a second drive (M.2 SSD), your Windows installation on the internal drive is untouched. If you’re replacing Windows entirely, ensure your game saves are backed up to the cloud.

Step 1: Download the SteamOS Recovery Image

Valve provides an official SteamOS recovery image that can be used to install SteamOS on non-Steam Deck hardware. Head to store.steampowered.com/steamos and download the latest recovery image (it’s a compressed file around 3–4 GB).

At the time of writing, SteamOS 3.6 is the current stable release, which includes significant improvements to AMD handheld compatibility, better suspend/resume behavior, and updated Mesa drivers that benefit the ROG Ally X’s AMD Z1 Extreme APU.

Step 2: Flash the Image to Your USB Drive

You’ll need a flashing tool to write the image to your USB drive. Balena Etcher (free, available at balena.io/etcher) is the simplest option and works on Windows, macOS, and Linux.

1. Insert your USB drive into your PC
2. Open Balena Etcher and click Flash from file
3. Select the downloaded SteamOS image file
4. Select your USB drive as the target
5. Click Flash! and wait for it to complete (3–5 minutes)

Alternatively, you can use Rufus on Windows — choose DD mode when writing the image, not ISO mode.

Step 3: Disable Secure Boot on the ROG Ally X

SteamOS will not boot with Secure Boot enabled. You need to disable it in the BIOS before proceeding.

1. Power off your ROG Ally X completely
2. Hold the Volume Down button and press the power button to enter the BIOS
3. Navigate to Security → Secure Boot
4. Set Secure Boot to Disabled
5. Save and exit (press F10)

You can re-enable Secure Boot later if you need to boot back into Windows, but SteamOS does not require it to remain disabled indefinitely — re-enabling it after enrollment is possible with advanced configuration.

Step 4: Boot from the USB Drive

1. Plug your USB drive into the ROG Ally X via your USB-C hub
2. Power off the device
3. Hold Volume Down + Power to enter the boot menu
4. Select your USB drive from the boot device list
5. The SteamOS recovery environment will load

The boot screen will show a simple text-based menu. Don’t worry — this is normal. SteamOS installs through a command-line recovery image.

Step 5: Install SteamOS

Once in the recovery environment, you’ll see several options. Choose “Reimage Steam Deck” — despite the name, this installs SteamOS to whatever internal or connected drive you specify. The process is automatic and takes 10–20 minutes depending on drive speed.

If you have a secondary M.2 SSD installed in the ROG Ally X’s expansion slot, you can select that drive as the install target to preserve your Windows installation. If installing to the main drive, Windows will be replaced.

Once the install completes, the device will reboot automatically into SteamOS for first-time setup.

Step 6: First-Time Setup and Steam Login

SteamOS will boot into Game Mode by default — the same big-picture interface you know from the Steam Deck. Use the ROG Ally X’s thumbsticks and buttons to navigate. The controls are fully recognized out of the box in SteamOS 3.6.

1. Connect to your Wi-Fi network
2. Sign into your Steam account
3. Let Steam download any pending updates
4. Your library will appear and games will be available to install

For non-Steam games and emulators, press the Steam button, go to Power → Switch to Desktop to access the KDE Plasma desktop environment, where you can install EmuDeck, Heroic Games Launcher (for Epic/GOG), or Lutris.

Step 7: Fix Audio, Wi-Fi, and Controls (If Needed)

The ROG Ally X has very strong SteamOS compatibility as of 2025, but a few things may need attention on first boot:

• Audio: SteamOS 3.6 includes ROG Ally audio drivers. If sound isn’t working, go to Desktop Mode → System Settings → Audio and select the correct output device.
• Wi-Fi: The Ally X uses a MediaTek Wi-Fi chip that is supported in the Linux kernel. If Wi-Fi doesn’t appear on first boot, restart once — it typically resolves itself.
• Gyroscope: The ROG Ally X’s gyroscope is partially supported. For motion controls in games, you may need to install the handycon or hhd (Handheld Daemon) utility via Desktop Mode to improve controller emulation and gyro support.
• TDP Controls: Unlike the Steam Deck, the ROG Ally X’s TDP slider in SteamOS Game Mode defaults to 15W. Install PowerTools or SimpleDeckyTDP via the Decky Loader plugin manager for finer control.

Step 8: Install Decky Loader for Extra Features

Decky Loader is an open-source plugin manager for SteamOS Game Mode that adds features Valve hasn’t shipped natively. To install it:

1. Switch to Desktop Mode
2. Open a browser and go to decky.xyz
3. Download and run the installer
4. Switch back to Game Mode — you’ll see a new plug icon in the Quick Access menu

Recommended plugins for ROG Ally X users: SimpleDeckyTDP (TDP/wattage control), CSS Loader (interface themes), ProtonDB Badges (shows game compatibility ratings in your library), and Battery Tracker.

Performance: ROG Ally X Running SteamOS

In testing, the ROG Ally X running SteamOS 3.6 delivers excellent performance, in some cases matching or exceeding Windows for gaming workloads due to lower OS overhead. Here’s what to expect:

• AAA games at 800p: 45–60 fps at medium-high settings with FSR enabled
• Indie / lighter titles: Consistent 60 fps at 15W TDP
• Battery life: 10–15% improvement over Windows in gaming workloads due to reduced background processes
• Emulation: Excellent — PS3, Switch, and Wii U run well via EmuDeck

Proton compatibility means nearly your entire Steam library will work. Check protondb.com for per-game reports before expecting a title to run perfectly out of the box.

How to Dual-Boot Windows and SteamOS

If you want to keep Windows available, the cleanest approach is to install SteamOS on a second M.2 SSD. The ROG Ally X has one M.2 2230 slot used by the internal SSD — you can replace it with a higher-capacity drive, or use a USB-C-attached external SSD for SteamOS (performance will be slightly limited).

With two internal drives, you can select the boot drive at startup via the boot menu (Volume Down + Power) each time, or configure a GRUB bootloader for a menu-based selection. The community-maintained rEFInd boot manager works well for this use case on the ROG Ally X.

Frequently Asked Questions

Can I install SteamOS on the ROG Ally X without losing Windows?

Yes. Install a second M.2 SSD and target that drive during installation. Your original Windows drive is untouched.

Does the ROG Ally X work well with SteamOS?

Very well as of SteamOS 3.6 in 2025. All major hardware components including controls, Wi-Fi, audio, and suspend/resume work correctly.

Will this void my warranty?

ASUS hasn’t officially commented on the matter. In the US, installing a different OS generally doesn’t void hardware warranties under federal law, but consult local consumer protection rules.

Can I play Epic Games or Xbox Game Pass titles?

Xbox Game Pass streaming works in a browser. For downloaded Epic titles, use the Heroic Games Launcher in Desktop Mode.

Final Thoughts

Installing SteamOS on the ROG Ally X transforms an already excellent gaming handheld into something that feels more cohesive and purpose-built for the couch. The improved battery life, console-like interface, and access to the growing ecosystem of Deck-optimized tools make it worth the effort — especially if your library lives primarily on Steam. With Proton covering the vast majority of titles, you’re unlikely to feel limited.

For a full look at how the ROG Ally X compares to the Steam Deck and other top handhelds, check out our best gaming handhelds roundup.