Auto Low Latency Mode (ALLM) automatically switches your display to a low-latency operating state when it detects gaming content or high-speed input signals. The feature responds to HDMI 2.1 handshake protocols, triggering reduced processing delays without requiring manual menu navigation.
When active, ALLM typically disables post-processing features like motion smoothing, frame interpolation, and some colour grading. These features introduce measurable delay (often 30-50ms per effect), which accumulates enough to affect competitive gaming or fast-paced titles. By removing these enhancements, ALLM restores responsiveness at the cost of slight picture degradation.
Why it matters: Input lag compounds across your entire setup. A 5ms monitor delay plus 20ms TV processing plus 10ms controller latency creates a perceptible 35ms gap between your action and on-screen response. For fighting games, shooters, or rhythm games, this matters significantly. ALLM handles this automatically rather than forcing you to hunt through display settings mid-game.
Common gotchas: Not all displays implement ALLM effectively. Some simply reduce brightness or contrast rather than disabling actual processing chains. ALLM only works with compatible sources (PlayStation 5, Xbox Series X/S, select graphics cards) over HDMI 2.1 connections. Older HDMI standards don't support the protocol. Some displays falsely advertise ALLM support without functional implementation. Check independent reviews rather than relying on manufacturer claims.
Test whether ALLM actually improves your experience using built-in latency measurements or third-party tools. Perceived responsiveness varies by game genre and personal sensitivity.