This test moves objects horizontally at specific speeds synchronized to your monitor's refresh rate.
Motion blur happens when the pixels on your LCD or OLED screen cannot change colors as fast as the object moves. This results in a "smearing" effect or a trail behind moving objects, commonly known as ghosting.
Windows doesn't always set your monitor to the highest available refresh rate automatically. Use our FPS counter to verify that your browser is actually rendering at 144Hz, 240Hz, or 360Hz. If the number is capped at 60, check your Display Settings and browser HW Acceleration.
This test is based on the industry-standard "UFO" motion test. By tracking the moving saucer with your eyes, you can see if there is a distinct secondary image (overshoot) or a blurry trail (undershoot). Low-latency gaming monitors use "Overdrive" settings to minimize this effect, which you can tune while watching this live test.