What is NVIDIA Fast Sync and How to Enable It

If you often play games on your computer using a conventional monitor, you’d have definitely noticed screen tearing issues. This is most noticeable on fast-paced games when you’re swiftly panning using your mouse. The reason this happens is due to the fact that the graphics card’s rendering rate is out of sync with the monitor’s refresh rate. Suppose you have a 60 Hz monitor that’s capable of displaying up to 60 fps, but your GPU is rendering at anything above 60. As a result of this, you will notice that certain objects are not lined up perfectly, thereby hindering your gameplay session. Well, NVIDIA has a solution for you guys, as long as you own a Pascal or Maxwell-based GeForce GTX graphics card. Before we let you know how to enable the NVIDIA Fast Sync feature on your computer, let’s discuss what this technology actually does:

What is NVIDIA Fast Sync and How it Compares to V-Sync?

NVIDIA Fast Sync is the company’s newest solution to fix all the screen tearing issues, while keeping latency to a bare minimum, thereby making it a much better option than the traditional V-Sync technology. One of the biggest disadvantages of enabling V-Sync for gaming is input lag, which hinders the gaming experience, especially if you’re playing fast-paced games. Nowadays, most of the gamers prefer keeping V-Sync disabled as the latency could even go over 100 ms. With Fast Sync, that’s not the case at all, as the latency is significantly minimized and pretty close to what you’d get when V-Sync is turned off.

What is NVIDIA Fast Sync and How to Enable It

NVIDIA manages to make this possible by introducing a new additional “Last Rendered Buffer” that sits right between the Front and Back buffer. Initially, the GPU renders a frame into the Back buffer, and then the frame in the Back buffer is immediately moved to the Last Rendered Buffer. After this, the GPU renders the next frame into the back buffer and while this happens, the frame in the last rendered buffer is moved to the front buffer. Now the Last Rendered buffer waits for the next frame, from the back buffer. In the meantime, the Front buffer undergoes the scanning process, and the image is then sent to the monitor. Now, the Last Rendered Buffer sends the frame to the front buffer for scanning and displaying it on the monitor. As a result of this, the game engine is not slowed down as the Back buffer is always available for the GPU to render to, and you don’t experience screen tearing as there’s always a frame store in the front buffer for the scan, thanks to the inclusion of Last Rendered buffer.

What is NVIDIA Fast Sync and How to Enable It
Image Source: Battle(non)sense

It’s worth noting that Fast Sync only works as along as the GPU is rendering at a frame rate above the monitors refresh rate. This means you’ll still experience screen tearing if the GPU is rendering at a frame rate lower than the monitor’s refresh rate. In order to solve this, you’ll need a G-Sync monitor that eliminates screen tearing by reducing the monitor’s refresh rate to the GPU’s rendering rate. That being said, G-Sync doesn’t eliminate screen tearing if the rendering rate of the GPU is above your monitor’s refresh rate. In conclusion, if you aim to completely eliminate all screen tearing issues, you need to enable Fast-Sync as well, in a G-Sync capable monitor.

Enable Fast Sync Using NVIDIA Control Panel

If you have a supported GeForce GTX graphics card that is GTX 960 or newer, you will be able to easily enable it on the NVIDIA Control Panel. This software comes along with your graphics drivers and there’s no need to install it separately. So, simply follow the steps below to get this done in a jiffy:

  • Right-click anywhere on the desktop and click on “NVIDIA Control Panel” to open up the software.

What is NVIDIA Fast Sync and How to Enable It

  • Now, click on “Manage 3D settings” located in the left pane of the software.

What is NVIDIA Fast Sync and How to Enable It

  • Once done, scroll down in the right pane and click on “Vertical Sync” option. Now, choose “Fast” from the dropdown and click on “Apply” to save these settings.

What is NVIDIA Fast Sync and How to Enable It

Well, that’s pretty much all you got to do, in order to enable NVIDIA Fast Sync on your computer. However, you need to make sure V-Sync is disabled on all your games, as some games have this option turned on by default, as a result of which Fast-Sync might not work as you intended. It can be usually disabled by going to the Graphics/Video settings of any game.

What is NVIDIA Fast Sync and How to Enable It

                SEE ALSO: How to Set Up And Configure NVIDIA G-Sync

Use Fast Sync To Eliminate Screen Tearing Issues

Well, if you have a normal monitor with a capable GPU that’s capable of rendering at a frame rate above your monitor’s refresh rate, Fast-Sync will be able to completely solve all the screen tearing issues, while introducing just a minimal lag. Well, you don’t even have to spend a fortune on purchasing a G-Sync monitor as well. However, if you do have a G-Sync monitor, but your GPU is rendering at a frame rate above your monitor’s refresh rate, you will still face screen tearing issues until you enable Fast-Sync. We think NVIDIA has done a phenomenal job by introducing this new technology that can actually benefit gamers who had several issues with the traditional V-Sync. Well, what do you guys think about Fast Sync? Have you tried it already? Make sure to shoot your valuable opinions in the comments section down below.

comment Comments 8
  • If you have a G-Sync monitor, turn off VSync and just set the Max Frame Rate at 2 frames below the monitor maximum.

  • fast sync work very shitly it has tearing on low fps maybe does not work on dx12 and vsync on looking better..

    • Not that I know of, this setting requires a discrete NVIDIA gpu, if you can find a setting in the Intel graphics control panel that does something similar than yes, however I do not know of any setting that does this. If there is, it would probably be under 3d settings or games.

    • Not that I know of, this requires an NVIDIA gpu to enable, if Intel has something like this it would probably be in the graphics control panel under 3d or games. Try researching it or another option if you can’t find anything similar.

  • Hey, the lag is noticeable …. but tearing is less 🙂 i have a GF 980 Ti and CS GO does less tearing but a bit of lag not that much but maybe enough to anoy you 🙂

  • What I have found with my gtx 970 and fast sync enabled, frame rate capped at 58, is that fallout 3 and fallout 4 games run butter smooth. Providing you turn off vid sync in game or through confiig files with fallout 4; sorted and very happy.

  • Fast sync work below refreshrate. Its just like triple buferring but less input lag.

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