Understanding Monitor Refresh Rate (Hz), Response Time & Ghosting
Motion clarity guide for 60Hz, 120Hz, 144Hz, 240Hz, 360Hz, and instantaneous 0.03ms OLED panels.
How Real-Time Frame Rate & Hz Testing Works
By leveraging high-resolution requestAnimationFrame timing, this diagnostic syncs frame rendering directly with your monitor's vertical scan out. Tracking high-speed targets against pitch black helps identify:
Dark smearing trails behind moving targets, common when pixel Gray-to-Gray (GtG) transitions exceed frame duration.
Bright white or glowing halos caused by overly aggressive pixel voltage overdrive in monitor OSD menus.
Slight latency when pixels transition from true off state (#000000) to dark gray tones.
How to Unlock Maximum Refresh Rates
- Windows Display Settings: Navigate to Settings > System > Display > Advanced display and choose your maximum certified refresh rate.
- Certified Video Cables: Use DisplayPort 1.4 / 2.1 or HDMI 2.1 cables to ensure sufficient uncompressed bandwidth for 4K 144Hz+ or 1440p 240Hz.
- Browser GPU Acceleration: Confirm hardware acceleration is enabled in browser settings for seamless 240FPS+ rendering.