Windows 11 on the Steam Machine Still Wipes SteamOS

ETA PRIME put Windows 11 on Valve’s Steam Machine and measured game frame rates within 6 fps of SteamOS. Geekbench 6 multi-core jumped 22.1% on the same box.

Valve posted official Windows drivers for Steam Machine on July 7, 2026, a week after the cube began reaching buyers. Installing Windows still wipes SteamOS, and the dual-boot wizard Valve described had not shipped by early September 2026.

Valve Posted Windows Drivers a Week After Launch

The 2026 Steam Machine is a six-inch living-room PC that ships with SteamOS 3. Valve sells it as a PC, not a locked console, and the company said Steam Deck and Steam Machine can run other operating systems. The 512GB Steam Machine starts at $1,049, and the 2TB model is $1,349.

Inside is a semi-custom AMD Zen 4 chip with 6 cores and 12 threads, up to 4.8 GHz, at a 30W TDP. Graphics are semi-custom RDNA 3 with 28 compute units, a 2.45 GHz sustained clock, 110W TDP, and 8GB of GDDR6. Valve says that is over six times the horsepower of Steam Deck. Stock memory is one 16GB DDR5 stick.

Windows identifies that CPU as AMD 1772 and the GPU as a Radeon RX 7600-series part. Valve engineer Pierre-Loup Griffais said the company worked with AMD so owners would get current graphics fixes instead of a frozen launch build. The files went up on Steam Support on July 7, 2026.

THE WINDOWS PATH ON STEAM MACHINE

1. June 29, 2026: Valve begins shipping the Steam Machine with SteamOS 3.
2. July 7, 2026: Steam Support lists graphics, Wi-Fi, Bluetooth, and SD reader drivers for Windows.
3. July 15, 2026: ETA PRIME publishes Windows 11 versus SteamOS benches on a 64GB unit.
4. Early September 2026: Valve still has not shipped the SteamOS dual-boot wizard.

The drivers are offered as-is. Valve says it cannot support Windows on Steam hardware, and the recovery path back to SteamOS is the owner’s job.

A 22% CPU Lead That Games Barely Feel

ETA PRIME ran Geekbench 6.7.1 in SteamOS desktop mode and in Windows 11. Single-core moved from 2,424 to 2,503, a 3.3% gain. Multi-core moved from 7,986 to 9,750, a 22.1% gain, the widest gap in the video.

GEEKBENCH 6 ON THE SAME BOX

• Single-core: SteamOS 2,424, Windows 11 2,503, a 3.3% lead for Windows.
• Multi-core: SteamOS 7,986, Windows 11 9,750, a 22.1% lead for Windows.
• Cinebench 2024: Windows only, 99 single-core and 554 multi-core.
• Time Spy: 9,245 on the Steam Machine versus 10,310 on a Ryzen 5 5600X plus Radeon RX 7600 desktop.

He was clear about the asterisk. SteamOS desktop mode does not treat the chip the way game mode does, so the CPU may not sit in its highest power state unless a task demands it.

With Steam OS in desktop mode, it’s not handled like game mode. So, the CPU isn’t going to go into the highest performance mode in desktop mode, unless it really needs it.

ETA PRIME, Windows 11 On The Steam Machine

That 22.1% is still a real desktop result on the software Valve ships for browsing and file work. It is a weak predictor of in-game frames. Cinebench 2024, which ran only on Windows, put the 30W Zen 4 part 5.3% ahead of a Ryzen 5 5600X in single-core and 14.1% behind it in multi-core. Time Spy landed 10.3% under that 5600X plus RX 7600 desktop.

The Windows desktop also felt snappier in basic navigation, which matches what owners report after they strip the install down. The living-room shell is still SteamOS. The mouse-and-keyboard shell is where Windows pulls away.

Frame Rates Flip by a Couple of Frames

The gaming pass used built-in benches in three titles, Very High or Ultra, with no FSR, at 1080p, 1440p, and 4K. The two operating systems trade frame-rate wins across those three games, and the largest gap is 6 fps in Cyberpunk 2077 at 1080p.

ETA PRIME’S RASTER FRAME RATES

Windows takes every 4K line, always by 2 fps. Those 4K percentages look loud (4.5%, 11.1%, 7.7%) because the base rates are already in the 18 to 46 fps band, where two frames are a rounding error you can feel as stutter, not as a new preset. None of the three titles is a comfortable native 4K target on this GPU without upscaling.

SteamOS holds 1440p in all three games and keeps Cyberpunk’s 1080p Ultra run, 74 fps against 68 fps. Tomb Raider and Horizon stay within 1.7% at 1080p. Extra Windows-only testing put Forza Horizon 6 at about 74 fps at 1440p High with no FSR, which is a playable 1440p point on this box, not a comparison.

64GB of Dual-Channel Memory in the Test Rig

ETA PRIME did not bench a stock Steam Machine. He upgraded the unit from the factory 16GB stick to 64GB of DDR5-5600 in dual-channel. Both operating systems ran on that kit, so the OS gap is still a fair OS gap. It is not a fair picture of the $1,049 SKU.

Valve ships one 16GB SODIMM to keep the bill of materials down. The board has two slots, and owners can add a second stick. Dual-channel can move some CPU-bound games a lot and most GPU-bound games a little, which is why a 64GB kit is the wrong memory map for a buyer who has not opened the cube.

Read the table as “Windows versus SteamOS on a maxed memory config,” not as a review of the boxed 16GB machine. The OS delta stays small either way. The absolute fps would drop on the single stick, and some titles would drop more than others.

Why Anyone Would Wipe SteamOS Anyway

The switch is for software SteamOS cannot run cleanly, not for a higher average frame rate. Game Pass through the Xbox app, Windows-only launchers, and multiplayer titles whose anti-cheat blocks Proton are the jobs that justify a full conversion. A 2 fps swing at 4K is not.

THE CASES THAT SURVIVE A WIPE

• Game Pass: The Xbox app runs as a native Windows client, with no Proton translation layer in the way.
• Anti-cheat multiplayer: Several online shooters still refuse SteamOS, which is the practical reason people install Windows on Steam Deck as well.
• Desktop apps: Creative tools, overlay software, and Windows-only utilities load without a compatibility shim, and the desktop itself feels quicker.
• VR and odd peripherals: Owners have already used Windows on an external SSD to run PSVR 2 on this hardware without touching the internal SteamOS drive.

That last path is the unofficial dual-boot Valve has not productized. An external drive keeps SteamOS on the internal SSD, burns a USB port, and avoids the wipe. It is also slower than a partition on the internal NVMe, which is why people keep asking for the wizard.

Linux-side owners treat the fps tie as the point. SteamOS is free, the Big Picture shell is the product they paid for, and a 6 fps loss in one Ultra preset is cheaper than giving that shell up. Windows fans who already cleaned the install say the desktop is simply easier to live in. Both can be true on the same cube.

Dual-Boot Still Means a One-Way Door

Valve’s own support text is blunt. The hardware can dual-boot. The SteamOS installer cannot do it yet. Until that wizard ships with SteamOS, the documented path is a full wipe.

Installing Windows requires you to wipe your Steam hardware, and dual-boot with SteamOS is not currently available. While Steam Deck and Steam Machine are fully capable of dual-boot, the SteamOS installer that provides a dual-boot wizard isn’t ready yet. This will ship alongside SteamOS once it’s complete.

Valve, Steam Hardware Windows Resources

Steam Deck owners have heard that sentence for years. The Machine inherited the same gap on day one. Manual partitions, rEFInd, and a second disk all work for people who will edit a boot menu. That is not the living-room flow Valve sells with the Steam Controller.

Storage makes the missing wizard worse. The 512GB model barely holds two operating systems plus two game libraries. The 2TB model can, if someone splits the NVMe by hand. Valve also notes you can put an OS on a microSD card, which is a poor place for Windows game installs.

Valve’s other line is the support ceiling: the company provides the files as-is and is not able to offer Windows-on-Steam-hardware support. If the install goes badly, the way home is the SteamOS installer and recovery image, not a ticket to Valve.

Four Drivers and a Wired Ethernet Cable

The Windows pack is four files, not a full OEM image. Everything else is meant to come from Windows Update. Setup still has a few traps that are easy to miss if you treat this like a normal desktop install.

WHAT THE WINDOWS SETUP ACTUALLY NEEDS

• Graphics: Run Setup.exe from Valve’s AMD package after Windows is on the drive.
• Wi-Fi: Right-click qcwlan64.inf and install it; wireless is missing until that step.
• Bluetooth: Right-click BtFilter.inf and install it the same way.
• SD reader: Run Setup.exe for the card reader if you want microSD in Windows.
• Boot menu: Power the Machine fully off, then tap Escape on a keyboard while it comes back up.
• Product key: Windows wants internet for activation, and Wi-Fi is dead until the inf file is in, so Ethernet is the clean path.

Copying the driver folder onto the install USB before you start saves a second reboot. Skipping the product key until Ethernet or Wi-Fi is up avoids a stuck OOBE screen. Secure Boot can also get in the way of USB media, which is a BIOS toggle, not a Valve setting.

Once those four packages land, ETA PRIME said the hardware came up clean: display, wireless, Bluetooth, and the reader all worked. The pain is the door in, not the driver quality after you are through it.

The Living Room Still Runs on SteamOS

ETA PRIME’s own close matches the numbers. Swapping operating systems is a lot of work if the goal is a few extra frames. It is a short job if the goal is a Windows-only app. SteamOS remains the better default for a TV, a Steam Controller, and a library that already runs on Proton.

Windows 11 is now a first-class guest on this AMD cube in the only way Valve knows how to ship: a driver zip, a wipe warning, and a recovery link. Game frames stay inside a 6 fps band. The desktop and Geekbench multi-core scores move more, with that desktop-mode asterisk attached. The missing piece is still the wizard that would let both systems sit on the same SSD without a leap of faith.

Until that installer ships, the official Windows 11 path on Steam Machine is a conversion, not a feature. Owners who want both keep using a second drive. Owners who want SteamOS leave the drivers on the Support page and stay in game mode.