# ROG Ally X Mod Adds Snap-On 120Hz Second Screen Modular dual-screen solution for handheld gaming devices - **Source:** [Yanko Design](https://brifing.si/source/41d28791-ef47-4e0b-a40a-2a5efca0c11b) - **Published:** 2026-09-01 - **Original article:** - **On Brifing:** https://brifing.si/s/ad518474-c8be-47f4-b9ad-8ebad7981aee ## Modular Solution This mod for ROG Ally X adds a second 120Hz display using a budget portable monitor and magnetic phone mounts. Magnetic MagSafe rings and a dual-sided phone holder allow easy attachment and removal. The system repurposes existing accessories rather than requiring custom-designed components. ## Technical Compatibility The 7-inch 1080p IPS add-on display perfectly matches ROG Ally X's 120Hz refresh rate. Unlike cheaper solutions that often suffer from 60Hz/120Hz mismatch, this maintains synchronization between both screens. Matching refresh rates create a unified visual experience across displays. ## Gaming Applications For Nintendo DS/3DS/Wii U emulation, the top screen shows main content while Ally X's touchscreen serves as bottom display. Flight and racing sims use the second screen for instrument panels. Fallout 4's Pip-Boy interface can be moved to the secondary display. ## Setup Details Windows initially detects the panel at 60Hz, requiring manual adjustment for 120Hz and FreeSync. The magnetic attachment system enables quick removal. Right-angle USB-C adapters keep cables neatly organized during use. ## Power Consumption The second screen draws power directly from the handheld, significantly reducing battery life. Dual-screen operation particularly impacts endurance, making external power sources advisable for extended sessions. This tradeoff balances functionality with portability. ## Design Innovation The most innovative aspect is using no custom parts - standard phone mounts and portable monitors are creatively repurposed. This approach maintains functionality while keeping costs low. The solution demonstrates how existing tech can solve new problems. ## Usage Scenarios The mod snaps on for flight sim sessions and removes easily for commute gaming. It enables single-screen portability with dual-screen capability at home. Magnetic connections allow transitions in seconds, adapting to different gaming needs. ## Industry Impact This mod opens new possibilities for handheld gaming devices. Manufacturers may integrate similar solutions in future models. The consumer-created solution could inspire official implementations, showing demand for modular display options. ## Sources covering this story - https://www.yankodesign.com/2026/09/01/this-rog-ally-x-mod-snaps-on-a-120hz-second-screen-then-off-again/?utm_source=rss&utm_medium=rss&utm_campaign=this-rog-ally-x-mod-snaps-on-a-120hz-second-screen-then-off-again — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._