Asus has started selling the ROG Strix XG129C, a 12.3-inch touchscreen monitor pitched as a companion display for desktop PCs. It is small enough to sit beside a main screen, but priced like a proper monitor, which is exactly the sort of corporate confidence only accessory makers can get away with.
The Asus ROG Strix XG129C uses a 24:9 IPS display with 1920 × 720 resolution, 300 cd/m2 brightness, a 75 Hz refresh rate, and 1200:1 contrast. Asus is also leaning hard into the monitoring angle: the screen ships with a year of AIDA64 Extreme and two ROG SensorPanel interfaces, turning it into a live hardware dashboard for temperatures, clocks, and whatever else you like to obsess over while pretending to work.
ROG Strix XG129C specs and connectivity
- 12.3-inch touchscreen IPS panel
- 1920 × 720 resolution
- 24:9 aspect ratio
- 300 cd/m2 brightness
- 75 Hz refresh rate
- 1200:1 contrast ratio
- 125% sRGB and 90% DCI-P3 coverage
Connectivity is straightforward: one USB-C port carries video and system data over a single cable, a second USB-C port provides 20 W charging, and HDMI 1.2 broadens compatibility. That HDMI version is old enough to feel a little stingy, but the target here is clearly utility rather than high-end display bragging rights.
A 6.3 mm screen with a built-in stand
The monitor measures 6.3 mm thick, comes with a built-in stand, and can also be mounted on a tripod. Asus is selling it in Germany, Austria, and Switzerland for €240. For a second screen that doubles as a system monitor, that price puts it in awkward territory: niche enough to feel clever, expensive enough to make buyers ask whether a tablet plus software would do the same job.
Who this tiny display is really for
This kind of accessory tends to appeal to the same crowd that buys RGB cable combs and custom fan controllers: PC builders who like their desks to look engineered, not just used. Asus is not alone here either, with side displays and SensorPanel-style dashboards becoming a familiar niche among gaming brands. The difference is that most of those solutions are software tricks; this one is a dedicated slab of hardware with a retail price to match.