Adaptive Sync (VRR)

Adaptive sync, often called variable refresh rate (VRR), is a display feature that lets the monitor or TV adjust its refresh rate on the fly to match the frame rate the GPU produces. Each frame is shown when it is ready instead of waiting for a fixed refresh tick.

Why it matters

It removes screen tearing and most of the stutter that appears when FPS fluctuates, without the buffering delay of traditional V-Sync. It works only within the display's supported range, for example 48 to 144 Hz. Vendors use different names, including FreeSync and G-Sync, and the HDMI standard includes a VRR feature; support depends on the GPU, the display and the connection.

Example

A monitor supports 48-144 Hz VRR:

• Game runs at 90 FPS: monitor refreshes at 90 Hz.
• Game dips to 65 FPS: monitor drops to 65 Hz, with no tearing.
• Game falls to 30 FPS: below the range, some displays repeat frames to stay inside it.

Common mistakes

• Forgetting to enable VRR in both the display menu and the graphics driver.
• Using a cable or port that does not support it at the desired resolution.
• Assuming it fixes low frame rates; it only smooths delivery.

Related

• V-Sync
• Refresh rate
• DisplayPort
• HDMI

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