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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsVSync (vertical synchronization) coordinates frame presentation with your display’s refresh cycle to prevent screen tearing. Enable it on a fixed-refresh monitor when tear-free motion matters more than the last fraction of input latency. With a G-SYNC, FreeSync, or other VRR display, enable VRR and cap frame rate below the monitor’s maximum; use VSync or another tested control at the upper limit.
What VSync does
Your GPU renders frames whenever they are ready, while a monitor refreshes on a schedule. At 60 Hz, one refresh takes about 16.67 milliseconds; at 120 Hz it takes 8.33 ms; at 144 Hz, 6.94 ms; and at 240 Hz, 4.17 ms. If the display starts scanning a new frame before the previous one has finished, parts of both frames can appear together as a horizontal split. That artifact is screen tearing, the problem VSync is designed to address. Microsoft explains the underlying timing issue in its DirectX graphics guidance.
VSync controls when completed frames are presented so they align with the display cadence. It does not make the GPU render faster. Depending on the game and presentation API, it may also limit the apparent frame rate to the display’s refresh rate.
Benefits of enabling VSync
- Less tearing: Camera pans and horizontal movement look more coherent because frames are presented in step with refresh timing.
- Controlled output: The GPU is not normally presenting frames far above the display’s refresh ceiling.
- Possible lower power use: Limiting unnecessary rendering can reduce GPU utilization, heat, fan noise, and battery drain, although the result depends on the game, driver, workload, and any separate frame limiter.
- Better image integrity: For single-player games, video playback, and desktop applications, avoiding a tear can be more valuable than minimizing every millisecond of latency.
NVIDIA describes VSync as synchronizing application frame rate with display timing to eliminate tearing (NVIDIA support).
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Drawbacks and limits
Input latency can increase
Traditional VSync may make a rendered frame wait for an appropriate presentation interval. That can increase the time between an input and the image appearing, often compared with an uncapped, unsynchronized setup. The amount varies with buffering, frame pacing, the engine, driver, GPU load, and display processing; it is not a fixed penalty in every game.
Frame drops can look uneven
When a game cannot sustain the synchronization target, motion may become uneven or cadence changes may be obvious. NVIDIA illustrates a 60-FPS target dropping to lower synchronized levels such as 45 or 30 FPS (Adaptive VSync documentation). The exact behavior differs by API, buffering method, engine, and driver, and VSync does not cause the underlying CPU bottleneck, shader compilation pause, asset-streaming hitch, thermal throttle, or background interruption.
It can impose a ceiling
VSync commonly prevents presentation above the monitor’s refresh rate. That is useful for tear-free output but undesirable if you want an uncapped frame counter or the minimum possible synchronization wait. Turning it off also does not guarantee an uncapped rate: other engine, driver, or operating-system timing mechanisms may still throttle delivery (Microsoft variable-refresh-rate documentation).
VSync modes you may see
Standard VSync
- On: The application synchronizes presentation with the display.
- Off: The application is allowed to present without the conventional synchronization constraint, so tearing is possible.
Exact results depend on the game, API, buffering, and window mode.
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Adaptive VSync
NVIDIA’s Adaptive VSync synchronizes while performance is above the display threshold and disables synchronization when performance falls below it. That can avoid the most severe cadence changes below the cap, but the unsynchronized portion can tear. NVIDIA exposes it globally or per game under NVIDIA Control Panel > Manage 3D settings (documentation).
Fast Sync and Enhanced Sync
NVIDIA Fast Sync is intended for cases where the GPU renders substantially faster than the display. AMD Enhanced Sync is a vendor-specific alternative designed to reduce the latency and stutter associated with traditional VSync; AMD lists support across DirectX 9, 10, 11, 12, and Vulkan on qualifying hardware and software (AMD Enhanced Sync). Neither mode universally removes tearing, latency, and stutter at once, so test per game.
VSync versus G-SYNC, FreeSync, and Adaptive-Sync
VSync primarily changes presentation timing. Variable refresh rate (VRR) lets a compatible monitor change its refresh rate to follow frame delivery. G-SYNC is NVIDIA’s VRR ecosystem; FreeSync is AMD’s; Adaptive-Sync is the industry-standard basis used by many displays.
NVIDIA describes G-SYNC as matching monitor refresh to GPU frame rate and requiring a G-SYNC or G-SYNC Compatible display (NVIDIA VRR documentation). AMD says FreeSync synchronizes compatible displays and graphics cards and can use DisplayPort or HDMI depending on the display and implementation (AMD FreeSync).
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VRR operates within a specified range. If FPS exceeds the monitor’s maximum refresh rate, VRR alone cannot necessarily prevent every tear. AMD recommends enabling VSync or limiting frame rate in that situation. A useful model is: VRR handles changing rates inside its range; a cap or VSync handles the upper boundary.
G-SYNC displays use NVIDIA’s display processor, while G-SYNC Compatible models use another VRR implementation validated by NVIDIA for a baseline experience. They are not identical, and monitors can still differ in VRR range, overdrive, flicker, HDR, and motion clarity. Compatibility also depends on the GPU, cable, input, firmware, and driver.
Recommended settings by situation
| Situation | Starting setting | Main reason | Compromise |
|---|---|---|---|
| 60-Hz fixed-refresh display, FPS consistently above 60 | VSync On | Removes tearing | Potential latency |
| 60-Hz display, FPS often below 60 | Adaptive VSync or VRR | Reduces severe low-FPS cadence changes | Tearing may appear when synchronization is disabled |
| High-refresh VRR display | VRR On plus a cap below maximum | Smooth motion across changing FPS | Requires correct range and connection |
| Competitive game | VRR with a tested cap, or VSync Off if latency dominates | Balances responsiveness and tearing | No universal best choice |
| GPU renders far above refresh rate | VSync, a frame cap, or tested vendor sync mode | Limits waste and tearing | Lower peak FPS |
| Laptop on battery | VSync or a frame cap | May reduce power draw | Lower frame-rate ceiling |
How to configure VSync and VRR
1. Check the display
- Record native resolution, maximum refresh rate, and the listed VRR range.
- Check whether VRR works over DisplayPort, HDMI, USB-C, or only a particular input.
- Find the monitor-menu option named Adaptive-Sync, FreeSync, VRR, or G-SYNC.
The maximum refresh rate is not necessarily the VRR range.
2. Enable monitor VRR
- Open the monitor’s on-screen menu.
- Enable Adaptive-Sync, FreeSync, VRR, or the model’s equivalent.
- Save, then confirm the selected cable and input support the mode.
3. NVIDIA setup
- For VRR, open NVIDIA Control Panel > Display > Set up G-SYNC, enable G-SYNC or G-SYNC Compatible, choose full-screen or windowed-and-full-screen, and apply.
- For ordinary or Adaptive VSync, open Manage 3D settings, choose Global Settings or Program Settings, select Vertical sync, and apply.
- Prefer a per-game profile. NVIDIA recommends leaving the global setting at Use the 3D application setting rather than globally forcing VSync Off in cases where windowed applications can tear (NVIDIA support).
4. AMD setup
- Enable FreeSync in the monitor menu.
- Open AMD Software: Adrenalin Edition and check the Gaming or Display section, depending on the current layout.
- Confirm FreeSync is detected and enabled.
- If FPS regularly exceeds the display maximum, enable VSync or apply a frame cap.
5. Add a frame-rate cap
Use the in-game limiter first when it is stable; otherwise use a driver profile or a verified third-party limiter. NVIDIA’s built-in control is NVIDIA Control Panel > 3D Settings > Max Frame Rate (NVIDIA documentation). A cap slightly below the VRR maximum is a common starting point, not a universal law; limiter accuracy and game behavior determine the useful margin.
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6. Test with frame times
- Pan the camera and check for a tear line.
- Compare perceived delay, not just the FPS counter.
- Verify FPS stays inside the VRR range.
- Check for VRR brightness flicker, windowed-mode differences, and game-specific behavior.
- Use a frame-time graph to find cadence problems; average FPS alone cannot show them.
Troubleshooting common problems
Tearing remains with VSync enabled
- Confirm the game setting actually applied and that driver and in-game profiles are not conflicting.
- Check that monitor VRR is enabled and the cable/input supports it.
- Verify the application is not outside the VRR range.
- Test exclusive full-screen versus borderless mode; desktop composition can change presentation behavior.
- Rule out a capture artifact or a video-camera artifact.
VSync causes severe stutter
Check whether FPS is falling below the refresh target, whether a limiter is oscillating around the cap, and whether the frame-time graph shows CPU limits, shader compilation, asset streaming, or another hitch. Try Adaptive VSync or VRR if available.
Controls feel sluggish
- Test VSync Off with a sensible frame cap.
- Test VSync On at a stable frame rate.
- Test VRR On with a cap below the display maximum.
- Compare any vendor low-latency mode.
- Compare exclusive full-screen and borderless windowed mode.
Render queue depth, CPU and GPU load, frame time, display processing, and the engine all affect latency.
FPS is below the monitor refresh rate but tearing appears
VRR may be disabled, unsupported on the selected connection, outside its operating range, or inactive in that application. Ordinary VSync and VRR are not interchangeable.
FPS remains capped after VSync is off
Another frame limiter, engine timing rule, driver profile, operating-system compositor, or presentation path may be controlling delivery. Microsoft notes that VSync Off does not necessarily uncap a game (documentation).
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Special cases
Frame generation
With frame generation, the reported FPS and the cadence of genuinely rendered frames do not map directly to input-to-display latency. Treat the FPS counter as one measurement, not a complete responsiveness metric.
Consoles
Console menus usually abstract VSync. Use the console’s supported HDMI VRR option, enable the television’s Game Mode, and verify that the TV is operating inside its stated VRR range. Exact behavior depends on platform, game, HDMI mode, and display.
Choosing a VRR monitor
Match the monitor to your GPU and usual frame rate rather than buying a badge. Check native resolution, sustainable FPS, refresh rate, actual VRR range, connection support, G-SYNC Compatible or FreeSync certification, response behavior, HDR, VRR flicker reports, firmware support, warranty, and price. NVIDIA’s monitor directory separates G-SYNC Ultimate, G-SYNC, and G-SYNC Compatible categories (directory). As a premium reference point, NVIDIA announced 27-inch 1440p 360-Hz G-SYNC Pulsar displays starting at $599 in the United States from January 7, 2026; that is not a requirement for VSync or VRR (announcement).
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