Key takeaways
- DisplayPort 1.4 is the most reliable choice for both G-Sync and FreeSync at high refresh rates.
- HDMI 2.1 fully supports variable refresh, ideal for 4K high-refresh panels and consoles.
- Older HDMI can work with FreeSync but sometimes limits the refresh range.
- Use a certified cable, such as a VESA-certified DisplayPort cable, to avoid dropouts.
What's inside
Screen tearing, that ugly horizontal split where the top and bottom of the image don’t line up, happens when your GPU and monitor fall out of sync. Variable refresh rate technology, sold as NVIDIA G-Sync and AMD FreeSync, fixes it by making the monitor refresh in lockstep with the GPU’s output. The result is buttery-smooth motion with no tearing and no input lag penalty, and in 2026 nearly every gaming monitor supports it. The catch is that it’s frequently sitting there disabled out of the box.
This guide shows you how to confirm your hardware supports variable refresh, enable it in the right places, and tune the settings so it actually works in every game. Whether you’re running a FreeSync panel like the Samsung Odyssey G5 or a G-Sync Compatible display, the steps take five minutes and the difference is immediately visible.
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Confirm Your Hardware Supports It
Both your monitor and GPU need to support variable refresh. Almost all gaming monitors sold in the last several years include FreeSync, and most are also certified “G-Sync Compatible,” meaning they work with NVIDIA cards too. Check your monitor’s spec sheet or on-screen menu for a FreeSync or Adaptive Sync toggle. On the GPU side, any recent NVIDIA GTX/RTX or AMD Radeon card supports the feature. Note the panel’s variable refresh range, often something like 48-165Hz, since sync only operates inside that window.
Use the Right Cable
The connection you use determines whether variable refresh works at all. Not every port carries it reliably.
- DisplayPort 1.4 is the most reliable choice for both G-Sync and FreeSync at high refresh rates.
- HDMI 2.1 fully supports variable refresh, ideal for 4K high-refresh panels and consoles.
- Older HDMI can work with FreeSync but sometimes limits the refresh range.
- Use a certified cable, such as a VESA-certified DisplayPort cable, to avoid dropouts.
Enable It in the Monitor Menu
This is the step most people skip. Open your monitor’s on-screen display using its physical buttons and find the FreeSync, Adaptive Sync, or G-Sync setting, then switch it on. Some panels label it “Adaptive-Sync” or bury it under a “Gaming” submenu. If your monitor offers “Standard” and “Extended/Ultimate” FreeSync modes, Extended gives a wider sync range but occasionally causes flicker on some units, so start with Standard if you see issues.
Enable It in the GPU Control Panel
With the monitor set, turn it on in software. On NVIDIA, open the NVIDIA Control Panel, go to “Set up G-SYNC,” check “Enable G-SYNC,” and choose whether to apply it in fullscreen only or windowed as well. On AMD, open Adrenalin software, go to Gaming or Display settings, and toggle “AMD FreeSync” on. Confirm your monitor is running at its highest refresh rate in Windows Display Settings while you’re there, since variable refresh is pointless if the panel is stuck at 60Hz.
Cap Your Frame Rate for Best Results
Variable refresh works best when your FPS stays inside the panel’s sync range and below its maximum. The proven setup is to enable G-Sync/FreeSync, turn V-Sync on in the control panel (not in-game), and cap your frame rate about 3 FPS below your refresh rate, so 141 on a 144Hz display. This combination eliminates tearing without adding the input lag traditional V-Sync causes, and keeps frame pacing smooth. Use an in-game limiter or RivaTuner to set the cap.
Tips
- Run games in Fullscreen or Borderless; some titles ignore variable refresh in windowed mode.
- If you see flicker on dark loading screens, switch FreeSync from Ultimate to Standard mode.
- Enable variable refresh only on your primary display in multi-monitor setups to avoid conflicts.
- Use the NVIDIA/AMD pendulum or a tearing test to visually confirm it’s working.
Frequently Asked Questions
Does G-Sync work on a FreeSync monitor?
Usually yes. Most FreeSync monitors are “G-Sync Compatible,” so an NVIDIA card can drive variable refresh on them. Enable G-Sync in the NVIDIA Control Panel and FreeSync in the monitor menu. A handful of panels aren’t certified but often still work.
Does variable refresh add input lag?
No, that’s its main advantage over traditional V-Sync. When configured with a frame cap below your refresh rate, it removes tearing with negligible added latency, unlike V-Sync alone which adds noticeable lag.
Why isn’t my G-Sync/FreeSync working?
The most common reasons are the setting being off in the monitor’s own menu, using a cable or port that doesn’t carry it, or the game running in windowed mode. Check all three, and confirm the panel is set to its full refresh rate.
Should I still turn on V-Sync?
Enable V-Sync in the GPU control panel as a backstop for when your FPS exceeds the refresh rate, but cap your frame rate just below the max so V-Sync rarely engages. This hybrid setup gives the smoothest, lowest-latency result.
Conclusion
Enabling G-Sync or FreeSync is a free upgrade that transforms motion clarity, and it’s often just sitting disabled in your monitor’s menu. Confirm your hardware and cable support it, switch it on in both the monitor OSD and your GPU software, then cap your frame rate a few frames below your refresh rate for the perfect tear-free, low-lag experience. Once you’ve played with it on, you’ll never want to go back.
