What is G-Sync and how does it work?

26.04.2017 12:23

G-Sync is a technology developed by NVidia, which ensures that games are displayed almost jerk- and latency-free on the monitor.

Most monitors work with a constant refresh rate of 60Hz. The image is transferred 60 times per second from the graphics memory to the display.

However, current computer systems and graphics cards can be charged at a much higher number of FPS games. Therefore, it may happen that during a refresh cycle of the monitor, several images are calculated and output from the graphics card. From this the tearing resigns:

To solve the problem, you can activate the so-called vertical synchronization (V-Sync). In doing so, the graphics card wait with the image set-up until the screen refresh cycle of the monitor is completed. For a monitor at 60Hz, the graphics card will render 60FPS, although purely theoretical a higher value would be possible.

Advantages:

  • The spooling of many graphics cards is minimized
  • The graphics card is not fully utilized, thus consuming less energy and generating heat
  • Tearing is prevented

Disadvantages:

  • A jerking is produced which can leads to fatigue and cause headaches
  • The latency increases because the image output is delayed

G-Sync, on the other hand, synchronizes the image output of the monitor with the output of the graphics card. This eliminates the problems mentioned above and the image is output without errors, jitter or latency.

System requirements for a desktop computer
To use G-Sync on a desktop computer, the following requirements are required:

Graphics processor: NVidia GTX 650 Ti Boost or higher (also for SLI systems)
Operating system: Windows 7, 8, 8.1, 10 as well as Linux, FreeBSD and Solaris
Driver version: 340.52 and later
Monitor: G-Sync enabled monitor

To use G-Sync, the monitor must be connected to the graphics card via the DisplayPort.

System Requirements for Notebooks
To be able to use G-Sync with a notebook, the following requirements must be fulfilled:

Graphics processor: GTX965M or higher (also for SLI systems)
Operating system: Windows 7, 8, 8.1, 10 as well as Linux, FreeBSD and Solaris
Driver version: 352.06 and later

For notebooks, it is also important to ensure that the built-in display supports G-Sync. Although this function is supported by the graphics card for current devices. However, this does not automatically mean that you can use G-Sync with the built-in display. Usually an external monitor is needed, which is certified for G-Sync. Again, then make sure that the connection must be made via the DisplayPort.

AMD has developed and distributed a similar technology named FreeSync.


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