SteamOS PC system requirements: an installation preflight checklist

There is no reliable universal SteamOS PC system-requirements table. Valve names specific officially supported devices and describes broader AMD compatibility as improving, not complete. For an installation project, the practical requirements are a compatible device, a recovery plan, enough storage, network access, and a game/app library that makes the switch worthwhile.

For the support and recovery boundaries around a PC installation, see SteamOS on PC: Can You Install It?.

This page is the preflight companion to the broader SteamOS requirements guide. That page helps you decide whether a device is a good fit. This one is for the moment before installation, when you need to verify the equipment and prepare for an outcome that may include restoring your current system.

Requirement one: a device with a credible support path

Start with official support

Steam Deck and Lenovo Legion Go S are the devices Valve currently identifies as officially supported on SteamOS. If you have either, your question is setup and recovery, not whether the underlying hardware is a valid target. For other devices, look for manufacturer guidance and current Valve compatibility notes before you download anything.

Use exact-hardware evidence for other PCs

For another AMD handheld or desktop, use the complete model name and component list when researching. Confirm graphics, wireless, audio, Bluetooth, controllers, storage, external displays, and suspend behavior. A processor family or a GPU brand is not enough. Hardware details that look minor on a spec sheet can dominate the actual SteamOS experience.

Requirement two: a recovery USB and backup

Prepare at least 8 GB of USB storage

Valve's current installation instructions call for a USB drive with at least 8 GB of space. Writing the SteamOS recovery image formats the drive. Use a drive you can erase, and verify the destination before beginning the imaging process.

Back up before partitioning or wiping

SteamOS recovery actions differ: a repair can try to preserve data, while a re-image or wipe-and-install action can remove it. Keep an external backup and confirm that you can return to the previous operating system. Recovery is part of the system requirements because an unsupported test without a rollback path is not a sensible test.

Requirement three: firmware and boot access

Know how to reach the boot menu

Installation begins by booting from the recovery USB. Steam Deck has a documented button sequence; other PCs need their own boot-menu or BIOS/UEFI instructions. Look them up before you shut down. Do not wait until the system is wiped to discover that you do not know the correct key or that the keyboard does not work in firmware.

Change Secure Boot only when the device requires it

Valve notes that some non-Deck devices may need Secure Boot disabled to boot the recovery image. That is not a blanket instruction for every PC. Record the original setting and follow the device maker's guidance. A firmware change should be reversible and tied to a specific need.

Requirement four: enough storage and a stable connection

Plan for games, updates, and recovery

Storage needs depend on your library. SteamOS, updates, shader data, game downloads, and recovery space all consume capacity. Avoid a setup that leaves just enough room for the operating system and no room to play the games you installed it for.

Plan for network setup and app support

Steam Deck's initial setup needs Wi-Fi to sign in to Steam, and any SteamOS PC needs a stable connection for updates and game downloads. If you need a VPN or another networking client later, check that it supports the Arch Linux base used by SteamOS. Do not mix a networking setup into the first boot; test stock connectivity first.

Requirement five: a compatible game and application list

Check the games you cannot leave behind

List the games you play most, then check their SteamOS/Proton behavior. Valve's Deck Verified labels help with Steam Deck titles. For other PCs, individual reports can add context, but the game itself still sets the compatibility limit. Pay close attention to multiplayer titles and anti-cheat.

Check your non-game software too

Desktop Mode can run compatible software outside Steam, but Valve says applications need Arch Linux support. Check essential work apps, storage tools, browser needs, controller utilities, and network clients before you replace a system you use every day.