VRR Behavior Visualization

Visualizes how motion smoothness changes dynamically during variable frame rate conditions. Clearly explains browser JavaScript limitations regarding direct G-SYNC / FreeSync hardware status reporting.

Testing Instructions

Select a VRR fluctuation range (48–120 FPS, 60–144 FPS, 80–165 FPS).
Switch between Smooth Sine Wave oscillation and Fluctuating Random Gametime pacing.
Observe the moving test craft as its speed and render rate modulate smoothly.

Interaction Controls

Next Pattern

→Space

Previous Pattern←

Exit FullscreenEsc

Mouse / TouchTap screen to cycle

VRR Behavior Visualization: Web browsers do not expose low-level GPU APIs to directly query hardware G-SYNC or FreeSync activation. This tool demonstrates how variable frame cadence alters visual motion fluidity across common variable refresh ranges.

Motion Controls

Velocity (px/s)

Motion Direction

Background Contrast

VRR Window:

Pacing Wave:

What This Test Checks

Dynamic motion perception during continuous framerate modulation.
VRR range behavior (48–120 FPS, 60–144 FPS, 80–165 FPS).
Smooth sinusoidal versus erratic gaming framerate fluctuations.
Technical explanation of browser JavaScript VRR capability limits.

How to Perform the Test

Select your monitor’s approximate VRR range (e.g. 60–144 FPS).
Switch between "Smooth Sine Wave" oscillation and "Random In-Game Flux".
Observe how motion remains perceptually cohesive even as velocity and render frequency shift.
Review the browser limitation note regarding G-Sync / FreeSync hardware detection.

What to Look For

Fluid transition: In a true VRR hardware environment, changing framerates should not introduce judder.
LFC (Low Framerate Compensation): What happens when framerates drop below the 48Hz minimum threshold.
Brightness flickering: Certain VA and OLED panels exhibit subtle gamma/luminance shifts as refresh rate ramps up and down.

Common Display Problems & Diagnostic Guidance

VRR Gamma Flickering on OLED / VA Panels

Liquid crystal and OLED pixel voltages are calibrated for a specific refresh rate. When VRR frame times fluctuate wildly (e.g. from 144Hz down to 50Hz during loading screens), subtle gamma shifts can cause visible flicker.

Falling Below the VRR Minimum Window

If a game drops below 48 FPS on a 48–144Hz monitor without LFC (Low Framerate Compensation), VRR disengages, resulting in tearing or traditional VSync stutter.

Frequently Asked Questions

Can this web page verify if G-Sync or FreeSync is enabled on my PC?

No web browser API currently exists to directly report whether hardware VRR is active. This tool provides visual behavior modeling rather than hardware telemetry.

How do I ensure G-Sync is active in games?

Open the NVIDIA Control Panel, enable G-SYNC for Full Screen and Windowed mode, enable V-Sync globally in the 3D settings, and cap your in-game framerate 3 FPS below maximum refresh rate (e.g. 141 FPS on a 144Hz screen).