The XDO Stax is a semi-modular mini-PC capable of running the official SteamOS. However, its gaming performance is significantly limited due to the absence of a dedicated GPU. Besides the I/O module, no other add-ons have been announced for the system.
Silvio Werner (translated by Zhiwei Zhuang), Published 🇩🇪
Featuring SteamOS support, the XDO Stax is a stackable modular mini-PC that may remind some readers of a very similar device we previously covered. YouTuber ETA Prime recently released an in-depth video examining how well the official SteamOS runs on the Stax. Though marketed as modular, the Stax is still highly limited in flexibility. For instance, it currently lacks an external GPU option and can only be expanded with a removable base unit that provides additional I/O interfaces, including two 2.5 Gbit/s Ethernet ports, an HDMI output, two USB 3.2 Gen 1 ports, two USB 2.0 ports, and a single M.2 2280 slot connected via four PCIe 3.0 lanes.
The main unit itself features one full-function USB-C port as well as a second USB-C port with Power Delivery support. The Stax can be configured with either an AMD Ryzen 5 6600U or Ryzen 7 7840U processor, though no options are available for a dedicated GPU, limiting its performance in demanding games. That said, ETA Prime demonstrated that Cyberpunk 2077 runs quite smoothly at Full HD on SteamOS, whilst Elden Ring requires a reduced resolution of 900p to maintain fluid gameplay. The main unit includes one M.2 2242 SSD slot and two RAM slots supporting up to 6,400 MHz LPDDR5 memory. Measuring 100 x 100 x 67 mm (3.9 x 3.9 x 2.6 in), the configuration with a Ryzen 7 7840U, 16 GB of LPDDR5 RAM, and a 512 GB SSD is currently available from PicoPC for around $335, down from its original list price of $390. PicoPC says it offers free worldwide shipping, but prospective buyers should review the company’s shipping policy first.
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Editor of the original article: Silvio Werner – Senior Tech Writer – 14576 articles published on Notebookcheck since 2017
I have been active as a journalist for over 10 years, most of it in the field of technology. I worked for Tom’s Hardware and ComputerBase, among others, and have been working for Notebookcheck since 2017. My current focus is particularly on mini PCs and single-board computers such as the Raspberry Pi – so in other words, compact systems with a lot of potential. In addition, I have a soft spot for all kinds of wearables, especially smartwatches. My main profession is as a laboratory engineer, which is why neither scientific contexts nor the interpretation of complex measurements are foreign to me.
Translator: Zhiwei Zhuang – Translator – 408 articles published on Notebookcheck since 2022
After graduating with a bachelor’s degree in environmental engineering, I moved from Singapore to Cologne in 2014 and began pursuing a career as a freelance translator. Much of my translation work focuses on science, engineering and technology. My fascination with computers and mobile electronics began when I was young. And I have fond memories reading countless tech and gaming magazines. Working with Notebookcheck gives me the opportunity to incorporate my personal interests into my professional work.
Silvio Werner, 2025-07-15 (Update: 2025-07-15)
