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"G-Sync Compatible" Master Thread

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alright so heres my experience so far. i feel i must be doing something wrong because i cant seem to see any significant difference with the pedulum demo or the that website test.


so i got my 34UC88-B connected via displayport and Freesync activated in OSD.

NVIDIA driver lets me enable g-sync - done.

set monitor to 75hz 

open cru and set range to 35-75

restart with cru

open wildlands for testing

feels amazing

then i got black frames / frame skipping


ok lets read online ...someone mentioned frame skipping aove 60hz

well that a bummer

alright set range to 35-61 as per instruction

open wildands ,....nice its gone.....ohhh no there it is.


tldr; runs, works, feels great, occasional frame skipping and weird dimming effect in loading screens might bother some but i think i still prefer it to no using g-sync

"I know its stupidly overdone and unreasonably unneccesary but wouldnt it be awesome if ..."


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On 1/15/2019 at 9:13 PM, Glenwing said:

This is a thread for all general discussion concerning NVIDIA's new "G-Sync Compatible" feature (i.e. NVIDIA "FreeSync" support).


Official announcement from NVIDIA can be found HERE.


Spreadsheet of non-certified monitors that have been tested by the community can be found HERE (not maintained by me). Post on the Reddit thread HERE if you want to contribute to it.




What is this new "G-Sync compatible" thing?


In the past, G-Sync has only operated using a proprietary protocol created by NVIDIA. This requires a proprietary display control chip that recognizes this protocol. Now, NVIDIA has added support for running G-Sync (variable refresh rates) via an alternate protocol, the standardized DisplayPort Adaptive-Sync protocol. This is the same protocol that AMD uses for FreeSync over DisplayPort. This means, in a nutshell, that NVIDIA has added support for G-Sync functionality on any monitor that supports AMD FreeSync over DisplayPort.


What are the requirements? How do I turn it on?


  • You must update your graphics card to the latest NVIDIA driver, available HERE.
  • You must be using Windows 10.
  • You must have a GeForce 1000-series card or newer. GeForce 900 series and below are not supported at this time.
  • You must have a monitor that supports the DisplayPort Adaptive-Sync protocol. This includes any monitor that supports AMD FreeSync over DisplayPort.
  • You must be connected to the monitor with a DisplayPort-to-DisplayPort connection. This includes DisplayPort, Mini DisplayPort, and USB-C/Thunderbolt (assuming the USB-C/TB port has video capability provided by a 1000+ series NVIDIA GPU, which is not the case on all laptops), or any combination of these.
You turn it on using the instructions provided HERE.


Is a "G-Sync Compatible monitor" just NVIDIA's term for "FreeSync monitor" then?


No. NVIDIA is only calling monitors "G-Sync Compatible" if they have been certified to meet NVIDIA's implementation requirements. This is a method of quality control. The DisplayPort Adaptive-Sync protocol only specifies a method of supporting variable refresh rates, it does not make any mandates about the quality of the implementation (such as the operating range, etc.). Some early FreeSync monitors were notorious for implementing poor operating ranges (i.e. 48–60 Hz) or disabling response time compensation (RTC/overdrive) when FreeSync was enabled). NVIDIA's "G-Sync Compatible" is a branding that they will only use for monitors that they have certified to meet their implementation quality requirements.


So, does that mean only certain FreeSync monitors will be supported?


No. G-Sync can be enabled on any monitor with the DisplayPort Adaptive-Sync protocol, which includes all FreeSync monitors. If the monitor has not been certified as "G-Sync Compatible", then it just means G-Sync will not be turned on by default when you plug in the monitor, you will have to enable it manually. And keep in mind that you may encounter issues such as flickering or other problems, since the monitors have not been certified for compatibility.


Which monitors have been certified as G-Sync Compatible?


The list can be found in the NVIDIA announcement linked at the top of the post.


What about FreeSync over HDMI?


NVIDIA is only adding support for the DisplayPort Adaptive-Sync protocol. FreeSync over HDMI does not use the DisplayPort Adaptive-Sync protocol, they use a different protocol (seemingly a custom one developed by AMD, it's hard to say since AMD has never made any technical details available that I'm aware of. It does not use the HDMI Game Mode VRR protocol introduced with the HDMI 2.1 specification, since FreeSync over HDMI predates the publication of version 2.1, unless whatever method AMD developed actually became standardized as that protocol. Like I said, no details released, so we can only speculate).
For now, FreeSync monitors with no DP input, which only support FreeSync via HDMI (there are a few) will not be able to enable G-Sync with this update.
EDIT: No, a DP to HDMI adapter will not help. As mentioned in the "requirements" section, you need a DisplayPort-to-DisplayPort connection.


What are "G-Sync Premium Experience" and "G-Sync Ultimate"?


In addition to the "G-Sync Compatible" certification, NVIDIA is introducing two new terms to classify G-Sync displays.
Basically, "G-Sync Premium Experience" refers to normal G-Sync monitors that we're familiar with, equipped with a traditional G-Sync module (V1 or V2). These modules provides support for other non-G-Sync related features such as ULMB (backlight strobing) as well as NVIDIA's advanced variable overdrive algorithm to reduce motion blur during G-Sync operation, which are not required for "G-Sync Compatible" displays but are included on all traditional G-Sync monitors.
"G-Sync Ultimate" is NVIDIA's new term for monitors that use their updated V3 G-Sync module (such as the ASUS PG27UQ and Acer X27 4K 144 Hz G-Sync monitors). These monitors are required to pass the VESA DisplayHDR 1000 certification (which implicitly requires FALD backlighting if it's an LCD panel monitor) and have a wide color gamut.


How is G-Sync working without a module now? Does this mean it was never needed?


The traditional G-Sync protocol created by NVIDIA still only works with the G-Sync module. With this update, NVIDIA has added support for a different protocol that accomplishes the same thing. They've just decided to call it "G-Sync" too. "G-Sync" has been effectively expanded to an umbrella term to refer generically to "variable refresh rates on NVIDIA GPUs".
The module was required when G-Sync was first created, because the DisplayPort Adaptive-Sync protocol did not exist at the time. Recall that the DisplayPort Adaptive-Sync protocol was only developed by AMD and adopted into the DP standard in response to G-Sync (granted it was based on an eDP feature called Panel Self-Refresh, but we'll hold that aside). There are some arguments to be made about how long it took for NVIDIA to adopt the standardized protocol once it was created, whether they should have abandoned the module-based approach along time ago, and whatnot, but at least accusations about "the G-Sync module doesn't really do anything and never has" are simply not factually accurate.




Please feel free to continue all discussion in this thread, report your experiences and test results, etc. :)

I seem to be able to use gsync with no problems in my Acer XR342CK with an RTX 2080 although the range is not brilliant it is better than nothing at 50 to 75hz making dips below the refresh rate so much better. I tested in battlefield v at 3440x1440 on the ultra preset with a 2080 and a 5930K @4.4GHz and used the monitors built it refresh rate monitoring feature in the osd to validate panel changing its refresh rate and so far no issues that Nvidia have talked have come up.

Main PC Specs:

- CPU i7-5930K @4.4GHz, MOBO Asus X99 Deluxe U/3.1, RAM 32GB Corsair Vengeance LPX DDR4, GPU EVGA GTX 980 Ti with Arctic Accelero Xtreme III, STORAGE Samsung 850 EVO (500GB) + WD RED (2TB) + WD BLUE (2TB), COOLER Kraken X62, PSU Corsair HX1000i, CASE Master Case Pro 5.


- MONITORS Acer XR342CK + Samsung S24E510C, KEYBOARD Corsair K70 RGB, MOUSE  Logitech G502 Proteus Spectrum, MIC Blue Yeti, HEADPHONES Audio Technica ATH-M50x



- CPU i5-4570, MOBO Asus H81M-PLUS, RAM 8GB Corsair Vengeance LPX DDR3, GPU Asus Pheonix GTX 1050 Ti, STORAGE Samsung 840 EVO (250GB) + WD Blue HDD (1TB), COOLER Intel Stock Cooler, PSU Novatech 500W PSU, CASE Novatech Stealth Case.

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On 1/16/2019 at 12:36 PM, LinusOnLine said:

Works on my AOC C32G1 with a 1070ti on DP and 144hz.

I am very pumped.  Just bought this monitor and had no idea that G-sync would work on it. I had just upgraded my older monitor for a faster refresh rate and just found out about this little bonus w/ G-Sync. I have a GTX 1070 and the AOC C32G1 will be delivered on Weds.  I'll report back the results after I get the AOC set up.

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Just tried it on the GIGABYTE AD27QD and doesn't work. Once I apply for "this display" and I start up a game screen goes weird then blacks out and switches itself into sleep/standy mode.



It does work. For some reason first time I tried it didn’t. Update to last driver 


MoBo: MSI B450 Pro Gaming Pro Carbon ACCPU: Ryzen 2700x 1.36V @ 4.15GhZ  | Cooler: NZXT  Kraken X52  GPU: MSI GeForce RTX2070 Armour +186MhZ /+500MhZ | RAM: Corsair Vengeance LPX (2*8) 16GB 3200MhZ | Samsung 970 evo M.2Nvme 500GB Boot  / Samsung 860 evo 500GB SSDPSU: RM550x (2018) | Case: Fractal Design Meshify C white |

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So could G-sync be enabled on an Asus VG278QR  monitor with msi geforce gtx 1060 6gb gaming x? This monitor has DisplayPort 1.2 and "features Adaptive-Sync (FreeSync™) technology" according to Asus

I am trying to convince myself to buy this monitor 😁

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