Variable Refresh Rate (VRR)
Variable Refresh Rate (VRR) syncs the display's refresh to the graphics card's frame rate, eliminating screen tearing and reducing stutter. The main flavors are VESA Adaptive-Sync (the DisplayPort standard), AMD FreeSync, NVIDIA G-Sync, and HDMI Forum VRR (HDMI 2.1). You need a GPU and display that share a compatible VRR mode, plus a cable with enough bandwidth for the resolution and refresh rate.
Without VRR, a display refreshes at a fixed rate (say 60 Hz). When the GPU's frame rate does not match, you get tearing or stutter. VRR lets the panel wait for each finished frame, so motion looks smooth across a range of frame rates — a big deal for gaming.
VRR technologies compared
| Technology | Interface | Notes |
|---|---|---|
| VESA Adaptive-Sync | DisplayPort (1.2a+) | The open standard FreeSync is built on |
| AMD FreeSync | DisplayPort & HDMI | Royalty-free; very widely supported |
| NVIDIA G-Sync | DisplayPort & HDMI | Hardware-module or “G-Sync Compatible” (Adaptive-Sync) |
| HDMI Forum VRR | HDMI 2.1 | Standard VRR for 4K @ 120 Hz; used by consoles |
What you need for VRR
- A GPU (or console) and a display that both support the same VRR technology.
- The right interface: Adaptive-Sync over DisplayPort, or FreeSync / HDMI Forum VRR over HDMI (HDMI 2.1 for 4K120 VRR).
- A cable with enough bandwidth — an Ultra High Speed HDMI or DP8K cable for high-refresh 4K.
- VRR usually enabled in the GPU control panel and the display's on-screen menu.
For the gaming connection choice, see HDMI vs DisplayPort.
VRR: frequently asked questions
What is Variable Refresh Rate (VRR)?
VRR lets a display refresh in step with the graphics card's frame rate instead of at a fixed rate, removing screen tearing and reducing stutter in games. It requires a GPU and a display that both support a compatible VRR technology.
What is the difference between FreeSync and G-Sync?
Both are VRR implementations. AMD FreeSync is built on the royalty-free VESA Adaptive-Sync standard and is widely supported. NVIDIA G-Sync originally needed a dedicated hardware module; NVIDIA now also certifies G-Sync Compatible monitors that use Adaptive-Sync. Many current monitors work with both.
Do I need HDMI 2.1 for VRR?
Not always. DisplayPort has carried VRR through Adaptive-Sync since DisplayPort 1.2a. Over HDMI, FreeSync has worked on many HDMI 2.0 displays, but standardized HDMI Forum VRR arrived with HDMI 2.1 — which is what consoles use for 4K120 VRR. Confirm the source, display, and cable all support the mode.
Does the cable affect VRR?
The cable does not “do” VRR, but it must carry enough bandwidth for your resolution and refresh rate. For 4K at 120 Hz with VRR over HDMI, use an Ultra High Speed cable; over DisplayPort, use a DP8K cable.
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