If you have ever shopped for a gaming monitor or dug into your graphics settings, you have run into G-Sync, FreeSync, and V-Sync.
They all promise smoother gameplay and an end to screen tearing.
The problem is that they work in completely different ways, and one of them is genuinely worse than the other two for gaming.
Here is what each one does, how they differ, and which to turn on for your specific setup.
The problem all three are trying to solve
Your monitor refreshes at a fixed rate. A 144Hz display redraws the screen 144 times per second, which works out to once every 6.9 milliseconds.
Your GPU does not render frames on that same tidy schedule. Depending on what is happening in the game, it might push out 90 frames one second and 160 the next.
When a new frame arrives in the middle of a refresh, the monitor shows the top of one frame and the bottom of another at the same time. That visible horizontal split is screen tearing.
All three of these technologies exist to stop tearing. They just go about it in very different ways, and that is where the differences start to matter.
V-Sync: the old fix with a real downside
V-Sync (vertical sync) is the original solution, and it has been around for decades. It forces your GPU to wait until the monitor finishes its current refresh before sending the next frame.
By locking your frame output to your refresh rate, tearing disappears. On a 60Hz monitor, V-Sync caps you at a steady 60 FPS.
The catch is input lag. Because the GPU is sitting there waiting for the monitor, your inputs take longer to show up on screen, and the delay can run anywhere from 20 to 50 milliseconds.
It gets worse when your frame rate drops. If your GPU can’t keep up with the refresh rate, V-Sync drops you down to a lower locked number, which causes a sudden stutter that you feel instantly.
That combination of added lag and stutter is exactly why competitive players keep V-Sync off. It solves tearing, but it makes the game feel sluggish doing it.
G-Sync: NVIDIA’s adaptive sync
G-Sync takes the opposite approach. Instead of forcing your GPU to wait, it makes the monitor wait.
The display changes its refresh rate in real time to match whatever your GPU is producing. If your card outputs 87 FPS, the monitor refreshes at 87Hz.
This is called variable refresh rate, or VRR, and it kills tearing without the input lag penalty V-Sync brings.
The original G-Sync needed a dedicated hardware module built into the monitor, which is why those displays cost more. Manufacturers had to buy the chip from NVIDIA and build it in.
There are three tiers you will see on monitor boxes today. G-Sync Compatible is a FreeSync monitor that NVIDIA has tested and verified, with no special chip required.
Standard G-Sync includes the hardware module, and G-Sync Ultimate is the flagship tier with the widest VRR range and proper HDR handling.
The module’s main advantages are a wider sync range (often down to 1Hz) and variable overdrive, which adjusts pixel response on the fly to reduce ghosting.
That overdrive tuning matters more than most people realize. If you have ever chased down trailing smears behind moving objects, our guide on how to test for and fix monitor ghosting breaks down what overdrive actually does.
FreeSync: AMD’s open-standard answer
FreeSync does the same core job as G-Sync. It matches the monitor’s refresh rate to your GPU’s output to eliminate tearing without adding lag.
The difference is how it is built. FreeSync uses the open VESA Adaptive Sync standard that is already part of DisplayPort and HDMI, so monitors don’t need a proprietary chip.
That keeps FreeSync displays cheaper and far more common.
FreeSync also has three tiers.
Plain FreeSync covers basic tearing-free gameplay within the monitor’s range.
FreeSync Premium adds Low Framerate Compensation (LFC), which keeps things smooth when your FPS drops below the monitor’s minimum VRR range.
FreeSync Premium Pro layers HDR support on top of that.
LFC is the feature worth caring about. Without it, adaptive sync simply stops working when your frame rate dips too low, and tearing creeps back in.
The thing nobody told you: they cross over now
For years the rule was simple and annoying. G-Sync meant NVIDIA, FreeSync meant AMD, and you bought your monitor to match your graphics card.
That rule is mostly dead. Since 2019, NVIDIA GPUs (GTX 10-series and newer) can run FreeSync monitors through G-Sync Compatible mode.
It is technically FreeSync running on an NVIDIA card, and it works on most FreeSync displays whether or not they carry official certification. AMD cards work with adaptive sync monitors too, so the old locked-ecosystem problem has basically dissolved.
What this means for you is freedom. You can buy almost any modern FreeSync monitor and get tear-free adaptive sync on an NVIDIA GPU, no native G-Sync module needed.
So which one should you actually use?
Here is the short version, sorted by what you are working with.
If you have an adaptive sync monitor (G-Sync or FreeSync), turn it on and leave V-Sync off in your games. This is the right answer for the vast majority of players.
If you have an NVIDIA GPU and a FreeSync monitor, enable G-Sync Compatible in the NVIDIA Control Panel. Connect over DisplayPort and switch on adaptive sync in your monitor’s on-screen menu.
If you are buying a new monitor, a FreeSync Premium display that is also G-Sync Compatible is the smart value pick. You get LFC, broad compatibility with both GPU brands, and you skip the price premium of a native G-Sync module.
If you have no adaptive sync monitor at all and you play competitively, leave V-Sync off and accept some tearing for the lowest input lag. For casual single-player games, V-Sync on with a frame limiter is fine.
If you are gaming on a console, look for HDMI VRR support rather than the FreeSync or G-Sync logo. That is the standard the PS5 and Xbox Series X use.
The native G-Sync module is a luxury, not a requirement. It gives slightly better overdrive in mixed-framerate scenarios, but for most people a good G-Sync Compatible monitor delivers nearly the same experience for less money.
The best settings combo most guides skip
Adaptive sync alone is great, but there is a known issue. VRR only works inside your monitor’s supported range, so if your FPS climbs above your refresh rate, tearing comes right back.
The fix is a specific combination that a lot of guides never explain properly. Get all four of these right and you get tear-free, low-lag gameplay across the board.
First, enable G-Sync or FreeSync in your GPU control panel and your monitor’s menu.
Second, set V-Sync to On at the driver level in the NVIDIA Control Panel or AMD Radeon Software. With adaptive sync active, this driver V-Sync stops behaving like a lag-inducing frame synchronizer and instead acts as a safety ceiling that keeps you from exceeding your refresh rate.
Third, turn V-Sync off inside the game itself. In-game V-Sync behaves differently from the driver version and reintroduces the input lag you are trying to avoid.
Fourth, cap your frame rate 3 FPS below your refresh rate. On a 144Hz monitor, cap at 141. This keeps you safely inside the VRR window so adaptive sync stays active and the driver V-Sync ceiling never actually kicks in.
For the frame cap, an in-game limiter or RTSS works well.
Our walkthrough on how to cap FPS in Steam without V-Sync covers the cleanest ways to do it, and if you want to chase responsiveness further, the best NVIDIA Control Panel settings for low latency guide goes deeper on the driver side.
If your monitor doesn’t have adaptive sync and you are stuck fighting tearing the hard way, we have a full rundown of how to fix screen tearing without V-Sync using frame caps, Fast Sync, and Scanline Sync.
Once you have adaptive sync set up the right way, going back to a fixed-refresh, V-Sync-only setup feels rough. Match the tech to your GPU, dial in the four-step combo, and you are set.