This test helps you visually inspect variable refresh rate behavior and animation frame pacing under changing frame workloads. Browser animation timing can provide evidence about frame pacing consistency, but cannot prove that a specific VRR hardware mode is engaged.
Browser animation timing provides evidence about frame pacing and render synchronization, but cannot prove that a specific hardware VRR (G-Sync, FreeSync, or HDMI VRR) mode is engaged. True hardware variable refresh requires dedicated OS driver handshakes and full-screen exclusive 3D game engines.
Verify that your monitor and browser are actually running at their maximum refresh rate.
Check for horizontal tear lines during motion to verify active V-Sync, G-Sync, FreeSync, or VRR support.
Check pixel response times and overdrive artifacts with high-speed moving elements.
