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Native ‘G-SYNC’ support implies that a monitor has a dedicated module installed by NVIDIA while ‘G-SYNC Compatible’ relies on VESA’s Adaptive-Sync protocols over DisplayPort, HDMI, and/or USB-C connection.
The G-SYNC chip offers certain advantages at a higher cost, such as a wider variable refresh rate (VRR) range, marginally lower input lag, and variable overdrive.
After the introduction of NVIDIA’s G-SYNC Compatible program, it didn’t take long for monitor manufacturers to manipulate it for advertising purposes.
You can now find ‘NVIDIA G-SYNC’ stickers on monitors that don’t have dedicated G-SYNC modules.
You can also find monitor product pages which claim that the display is ‘G-SYNC Compatible’ yet it’s not officially certified by NVIDIA as such.
Continue reading to learn what exactly is the difference between G-SYNC and G-SYNC Compatible monitors, and how can you check whether a monitor has a G-SYNC module, and if it is officially certified as G-SYNC Compatible or not.
What Is G-SYNC?
G-SYNC monitors have a special chip installed in them which allows the monitor to change its refresh rate dynamically – according to GPU’s frame rates (Hz=FPS) which in turn eliminates screen tearing and stuttering as long as your FPS rate doesn’t exceed the monitor’s maximum refresh rate.
Unlike V-Sync though, G-SYNC does not introduce a significant input lag penalty.
Another advantage of a dedicated G-SYNC module is variable overdrive.
Gaming monitors use overdrive to push their response time speed so that the pixels can change from one color to another fast enough in order to prevent ghosting/trailing behind fast-moving objects.
Most monitors without G-SYNC, however, don’t have variable overdrive, but only fixed modes; for instance: Weak, Medium, and Strong. The problem here is that different refresh rate requires different levels of overdrive.
So, at 144Hz, the ‘Strong’ overdrive mode might perfectly eliminate any trailing, but it will be too aggressive if your FPS rate drops to ~60FPS/Hz which will cause inverse ghosting or pixel overshoot.
For the optimal performance, you would need to manually change the overdrive mode according to your FPS rate which isn’t possible in video games where your FPS rate fluctuates a lot.
G-SYNC’s variable overdrive can change on the fly according to your refresh rate thus removing ghosting at high frame rates and preventing pixel overshoot at lower frame rates.
There are some non-G-SYNC monitors that support variable overdrive (Cooler Master GM27-CF and GM34-CW) and similar adaptive overdrive (Nixeus EDG27 and EDG274K), but at the moment, such displays are scarce.
Yet another advantage of having a dedicated G-SYNC module is a wide variable refresh rate (VRR) range. All G-SYNC monitors support VRR down from 30Hz up to their maximum refresh rate.
Below 30Hz/FPS, the frame rate gets multiplied (for instance, on a 144Hz monitor: 29FPS -> 116Hz, 28FPS -> 140Hz) for smoother performance.
In contrast, most monitors that use Adaptive-Sync have their VRR range start at 40Hz or 48Hz.
They also support frame rate multiplication via the AMD LFC (Low Framerate Compensation) technology, but only if the maximum refresh rate of a monitor is at least double the lower end of the VRR range.
So, an Adaptive-Sync/FreeSync/G-SYNC Compatible monitor with a 48-144Hz VRR range supports LFC, but a monitor with a 40-60Hz range does not.
Next, keep in mind that G-SYNC monitors only support G-SYNC over DisplayPort, at least at the time of this writing.
Even some revisions of older G-SYNC monitors such as the Dell AW3418DW now support Adaptive-Sync over DP.
Which Monitors Have Native G-SYNC Support?
If you want a gaming monitor with an integrated G-SYNC module, you have to be careful when buying one.
In the picture above, we have the popular LG 27GL850 which has an NVIDIA’s G-SYNC sticker, but this monitor does not have a dedicated module installed, it’s just certified by NVIDIA as ‘G-SYNC Compatible’.
The best way to ensure you’re getting a native G-SYNC monitor is to visit NVIDIA’s website and check their list of G-SYNC monitors.
We also have a buyer’s guide for the best G-SYNC gaming monitors currently available where you can check out which models are actually worth considering over the G-SYNC compatible models.
There’s a third G-SYNC tier called G-SYNC Ultimate which also features a dedicated chip installed in the monitor, but with the addition of HDR (High Dynamic Range) support and advanced display capabilities such as wide color gamut, high peak brightness, local dimming, etc. You can learn more about G-SYNC Ultimate here.
What Does G-SYNC Compatible Mean?
Just like AMD’s FreeSync technology, NVIDIA’s G-SYNC Compatible mode relies on the open standard Adaptive-Sync protocols that exist in DisplayPort, HDMI, and USB-C (using DisplayPort Alternate Mode) connection.
Before NVIDIA allowed for Adaptive-Sync to be utilized with their graphics cards via a driver update in January 2019, if you had an NVIDIA GPU, you could only get a variable refresh rate on a native G-SYNC monitor.
So, what exactly differentiates a G-SYNC Compatible monitor from an Adaptive-Sync or FreeSync monitor?
A G-SYNC compatible monitor is essentially an Adaptive-Sync display that’s been validated by NVIDIA to work without any issues (such as flickering and other visual artifacts) through their testing.
At the moment, the G-SYNC Compatible mode is only supported over DisplayPort on monitors, and it requires a GTX 10-series or newer GPU, Windows 10, and at least the 417.71 NVIDIA drivers.
Adaptive-Sync or FreeSync monitors that aren’t certified by NVIDIA as ‘G-SYNC Compatible’ can also utilize VRR if you have a compatible NVIDIA graphics card, but smooth performance is not guaranteed.
Depending on the monitor, it may work without any issues, with some minor or big problems, or they may not work at all.
In most cases, it works perfectly fine though you may need to enable G-SYNC manually in the NVIDIA control panel.
The most common issue is with gaming monitors based on Samsung’s VA panels which frequently have the infamous brightness flickering issue, though it doesn’t affect every unit of a monitor.
Which Monitors Are G-SYNC Compatible?
Just like it’s the case with native G-SYNC monitors, you have to be careful about false advertising when it comes to G-SYNC Compatible monitors.
Monitor manufacturer may claim that a monitor is G-SYNC Compatible on their website or on a product page of an online retailer, but that doesn’t necessarily mean that the monitor has been officially validated by NVIDIA as such.
It could mean that the verification process is still pending, that they have tested the monitor themselves, or it may mean nothing at all.
To be sure, you’ll have to visit NVIDIA’s official list of G-SYNC compatible monitors – if a monitor isn’t there, then it’s not officially certified.
As NVIDIA updates their drivers, they’ll be adding new certified monitors to their list. They started with only 12 monitors, and at the time of this writing, they have almost 100 certified displays in total.
So, if the monitor you’re interested in is not listed right now, it may be added later. Unfortunately, there’s no way to see which monitors didn’t pass the verification process.
We keep an updated list of all officially certified G-SYNC Compatible monitors with links to our reviews and retailers.
Additionally, we have an always up-to-date buyer’s guide for best G-SYNC Compatible gaming monitors available.