DIY “Steam Machine at home” build shows what Valve now has to beat
Steam Machine inspired PC build for around $600 delivers solid performance in AAA games.
Some YouTubers move fast when new hardware appears, and some do not wait for the hardware at all. Just a day after Valve announced its Steam Machine mini PC for early 2026, ETA Prime has put together his own version using an ASRock DeskMeet X300 barebones kit and a budget Radeon card from AliExpress (a very special one). The result is a compact SteamOS box that aims to match Valve’s core spec and gives an early look at the kind of performance and price target Valve now has to clear.
The DeskMeet X300 case measures 218.3 x 219.3 x 168 mm, a bit larger than Valve’s cube-shaped Steam Machine chassis but still small for a full desktop platform. Inside, ETA Prime uses a Ryzen 5 5600 (6 cores, 12 threads, Zen 3, 65 W) with the stock Wraith Stealth cooler, 16 GB of DDR4-3200 memory, a 1 TB PCIe 3.0 NVMe SSD and the built-in 500 W PSU. The graphics card he ordered as an RX 6600 turns out to be a reflashed RX 6600M with 8 GB of VRAM , capped at around 100 W and with no user-accessible power sliders in SteamOS.
Source: ETA Prime
Valve’s Steam Machine design uses a six-core Zen 4 APU with a 30 W TDP and a 28 compute unit RDNA 3 GPU block that lines up with a Radeon RX 7600M class chip, rated up to 110W. On paper, that gives the official box newer CPU cores, a later graphics architecture and tighter power management.
Source: ETA Prime
In games, the DIY Gabecube holds up well. Elden Ring runs at 1440p with settings maxed and stays locked to 60 FPS. Spider-Man 2 at 1440p medium with FSR balanced lands around 70 to 75 fps, and moving to high with FSR quality plus frame generation pushes frame rates above 100 FPS. Cyberpunk 2077 at 1440p high keeps frame rates above 60 FPS, while The Witcher 3 at 1440p ultra with FSR quality also sits above 60 FPS.
Source: ETA Prime
The build focuses on used parts from eBay and that cheap GPU, so the total price comes in around $600-650. For that, you get a compact SteamOS PC that can handle modern AAA titles at 1440p with help from FSR and frame generation. Valve mentioned their target to is to run all Steam games with 4K at 60 FPS with upscaling.
So what’s the ideal price for Steam Machine?
