Jitter & Smoothing Test
Diagnose sensor noise, angle snapping, and polling instability. Move your mouse in slow circles.
Understanding Mouse Sensor Jitter
Jitter is unintended cursor deviation caused by sensor inaccuracies, high DPI interpolation, or a dirty mousepad. In our 2D Scatter plot, raw hardware tracking is visualized. A tight, condensed plot indicates a flawless sensor. A wide, scattered "cloud" indicates severe hardware noise.
Competitive gamers need minimal jitter (a score close to 0.0) to ensure their crosshair goes exactly where their hand moves.
What is Angle Snapping (Smoothing)?
Some mouse firmware tries to "fix" jitter by artificially predicting your movement and forcing it into a straight line. This is called Angle Snapping or Ripple Control. While it makes drawing boxes in MS Paint easier, it is terrible for gaming because it adds input lag and prevents micro-adjustments.
Our engine detects Smoothing by looking for variance that is "humanly impossible" (e.g., locking perfectly to a single axis for extended periods).
The Role of Polling Rate
Your mouse's Polling Rate (measured in Hz) is how often it reports its position to your PC. If a 1000Hz mouse suddenly drops to 125Hz during a fast swipe, it will cause a massive lag spike (stutter) in-game. Our tool monitors real-time Hz to ensure your USB connection is stable.
Pro Diagnostic Tips
- Lower Your DPI: Sensors often struggle at 10,000+ DPI. If your Jitter score is high, lower your mouse DPI to a native step (400, 800, or 1600) and re-test.
- Clean Your Sensor: A single speck of dust on the sensor lens can cause massive jitter spikes.
- Avoid USB Hubs: If you see "Unstable Polling" warnings, plug your mouse directly into the motherboard. Avoid USB hubs or front-panel ports.