How does the ASUS ROG Ally X compare to the Steam Deck OLED for gaming performance?

For raw gaming performance, the ASUS ROG Ally X is the stronger handheld. It can run many modern games at higher frame rates than the Steam Deck OLED, especially when plugged in or set to higher power modes. The Steam Deck OLED is usually the better performance-per-watt handheld: it feels smoother and more consistent in many games at lower power, has a simpler console-like experience, and its OLED screen makes games look excellent even when frame rates are lower.

Best choice: pick the ROG Ally X if you want higher FPS, broader Windows game compatibility, and don’t mind tweaking settings. Pick the Steam Deck OLED if you want stable handheld play, better efficiency, simpler software, and a nicer screen experience.