Asus ROG Strix XG129C review: a 12.3-inch ultra-wide sidekick display that's hard to hate

The Asus ROG Strix XG129C is a 12.3-inch, 24:9 ultra-wide monitor priced at $199 / £189 — and yes, Asus officially calls it a gaming monitor. At sub-4.5 inches of vertical screen height, it's a tough sell on paper, but it's not really meant to replace your main display. It's a secondary screen for system status monitoring, app controls, or social media at a glance.

The specs are modest but functional: 1,920 x 720 resolution at 166 DPI (roughly on par with a 27-inch 4K panel for sharpness), an IPS panel, 300 nits brightness, and a 75 Hz refresh rate. No HDR. The standout feature is capacitive 10-point multi-touch support, which works out of the box over USB-C. There are two USB-C ports — one handles power in and display signal, the other pushes 20 W of power out — so a single-cable setup is possible, especially from a laptop. Desktop users have a harder time: getting touch, video, and power all running through one cable requires a motherboard with Thunderbolt and iGPU DisplayPort passthrough, a setup that's theoretically supported on Intel Z890 boards but inconsistent in practice. Worst case, you're juggling HDMI for video, one USB-C for power, and another for touch data — three cables for a 12-inch screen.

The XG129C sits in a niche that barely existed before secondary "status" displays became a thing — think Elgato Stream Deck-style utility but as an actual screen. At $199, it's not cheap: you can buy a full 27-inch 1440p IPS gaming monitor for the same money or less. But that comparison misses the point. This isn't competing with your main monitor; it's competing with the empty desk space next to it.

The reviewer came in skeptical and left genuinely won over — not despite the XG129C's limitations, but because it commits fully to its odd little niche. If you have a laptop and want a compact, touch-enabled secondary display for dashboards or utilities, it delivers. If you're chasing value per inch, look elsewhere.