SCREEN 📌 Quick Summary: A 240Hz test verifies that your high-refresh-rate gaming monitor is running at its full potential. Our free online tool also checks for ghosting, motion blur, and dead pixels — all in under 60 seconds.
240Hz Test — Free & Online
240Hz monitors are built for competitive gaming. Every millisecond counts. Our 240Hz test helps you verify your refresh rate and ensure your display is performing at its best.
What Our 240Hz Test Checks
- Refresh rate — Confirms your monitor runs at 240Hz
- Ghosting — Motion blur and trailing behind moving objects
- Motion blur — Blur caused by slow pixel transitions
- Dead pixels — Permanently black dots that never light up
- Response time — Pixel transition speed (1ms, 0.5ms)
How to Run a 240Hz Test
- Set your monitor to 240Hz — In Windows/Mac display settings.
- Use a DisplayPort 1.4 cable — HDMI may limit refresh rate.
- Ensure your GPU supports 240Hz — Check your GPU specs.
- Click "Start Full Diagnosis" — The test runs in fullscreen mode.
- Follow the on-screen instructions — Advance with Space or click.
Why Test 240Hz?
- Competitive advantage — Every frame matters in esports
- Verify your settings — Make sure you're getting 240Hz, not 60Hz
- Cable issues — Some cables limit refresh rate
- GPU limitations — Your GPU must support 240Hz output