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Glenwing

"G-Sync Compatible" Master Thread

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Posted · Original PosterOP

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.

 

FAQ

 

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

 

NVIDIA has released a driver update which allows NVIDIA graphics cards to run variable refresh rates using the VESA Adaptive-Sync protocol. This is the same protocol that AMD uses for FreeSync over DisplayPort. This allows NVIDIA cards to run variable refresh rates on FreeSync monitors (effectively, NVIDIA has added support for FreeSync, they just don't call it that because "FreeSync" is an AMD trademark).

 

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.

 

Discussion

 

Please feel free to continue all discussion in this thread, report your experiences and test results, etc. :)
 
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Reporting on LG 38UC99 (should also apply to 34UC88/34UC98/38WK95 and other 75 Hz LG Ultrawides)

 

Infamous 75 Hz frameskipping still persists (even though there are much less skipped squares in UFO Test, but there are still some), so I have focused on configuring for 60 FPS.

 

The most important thing is not to change default refreshrate in control panel after enabling FreeSync in OSD, because it completely breaks VRR. 75 Hz is default with no option to choose anything else, and it is meant to be this way. Even if 75 Hz frameskips, you still HAVE TO have 75 Hz refreshrate set, because otherwise VRR will cause massive stuttering, flashing and horizontal lines appearing all over the screen. I fought with this for 3 hours trying to make it work with 60 Hz main refreshrate while in fact you just need to leave this 75 Hz setting alone even despite frameskipping (and then lock to 60 in games)

 

So turn the FreeSync on in OSD, don't touch refreshrate in control panel, and enable everything G-sync related as per guides that are available in the web.

 

Then edit your FreeSync range in CRU (because you are left with pathetic 52-60 default range). For me it is 30-61. You have to set it at least 1 Hz above your target framerate (which is 60 beacuse anything above frameskips), because if you set it just at 60 then you will still get tearing at 60 FPS.

 

Lower range should be adjusted with trial and error method, however I have noticed something interesting. With 40-61 range things didn't feel exactly smooth, for example for locked 50 FPS, tearing was gone but it didn't feel as it should with VRR. Only going to 30-61 made things really smooth and working properly. Locking to 50, 40 and 35 FPS feels like it should with VRR, with frame drops inside 45-60 range being thousand times less bothersome than with V-sync.

 

The consequence of setting the lower range as low as 30 Hz is some flickering/blinking on loading screens. For my unit any gameplay flickering starts around 32 Hz (locking to 32 FPS), but it is very rare, and 35+ looks to be 100% working for now.

 

Of course because we still have 75 Hz as main refreshrate, you have to lock your FPS to 60 with RTSS for every game.

 

Also very important for fullscreen games, if you have an option to choose refreshrate, you also HAVE TO choose 75 Hz. If you choose 60 Hz, it will break in similar manner as when you choose 60 in Nvidia Control Panel.

 

So all in all it is far from just seamlessly enabling FreeSync just like you seamlessly enable G-sync on G-sync displays, but it works very well after all the tweaking.


Spoiler

MONITOR LG 38UC99 CPU i7 6900K GPU MSi RTX 2080 Ti Sea Hawk X MOBO Asus X99 Sabertooth RAM Crucial 4x4GB DDR4-3000 SSD ADATA XPG SX8200 PRO 512GB CASE Fractal Design Define R5 CPU COOLER Corsair H115i PSU Seasonic PRIME 1200W Platinum MICE Swiftpoint Z KEYBOARD Steelseries Apex M800 KEYPAD Logitech G13 SPEAKERS Logitech Z906 5.1 SOUND CARD Creative X7 Limited CHAIR Unique WAU 2 TV LG OLED 55B7V PHONE LG V30

 

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How do I know for sure if it's working or not? I have a ASUS VP228QG which is a 75Hz Freesync monitor and I've done the steps to enable G-Sync from the Nvidia Control Panel. I have no clue if it's working as intended though.

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Just now, MysteriousAeon said:

How do I know for sure if it's working or not? I have a ASUS VP228QG which is a 75Hz Freesync monitor and I've done the steps to enable G-Sync from the Nvidia Control Panel. I have no clue if it's working as intended though.

Use G-sync Pendulum Demo. If you see stutters or tearing it doesn't work. If it is perfectly smooth and with no tearing then it works. You can also a clear difference in games compared to V-sync on or off. FPS drops should be much less visible and there should be no tearing.


Spoiler

MONITOR LG 38UC99 CPU i7 6900K GPU MSi RTX 2080 Ti Sea Hawk X MOBO Asus X99 Sabertooth RAM Crucial 4x4GB DDR4-3000 SSD ADATA XPG SX8200 PRO 512GB CASE Fractal Design Define R5 CPU COOLER Corsair H115i PSU Seasonic PRIME 1200W Platinum MICE Swiftpoint Z KEYBOARD Steelseries Apex M800 KEYPAD Logitech G13 SPEAKERS Logitech Z906 5.1 SOUND CARD Creative X7 Limited CHAIR Unique WAU 2 TV LG OLED 55B7V PHONE LG V30

 

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Posted · Original PosterOP
9 minutes ago, MysteriousAeon said:

How do I know for sure if it's working or not? I have a ASUS VP228QG which is a 75Hz Freesync monitor and I've done the steps to enable G-Sync from the Nvidia Control Panel. I have no clue if it's working as intended though.

I guess I should add that to the FAQ later. Got places to be now though :)

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39 minutes ago, Krzych said:

75 Hz LG Ultrawides

i happen to have one and after some gameplay in AC Origins it appears to be working quite well. maybe there is some tearing and ghosting but it's imperceptible to me. i also tried the pendulum demo and also appears to be working. vsync off and there's lots of tearing, gsync on and it's gone, and appears smooth as the fps fluctuates 

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1 hour ago, Krzych said:

Use G-sync Pendulum Demo. If you see stutters or tearing it doesn't work. If it is perfectly smooth and with no tearing then it works. You can also a clear difference in games compared to V-sync on or off. FPS drops should be much less visible and there should be no tearing.

Everything is buttery smooth. I can confirm ASUS VP228QG is working with G-Sync very well.

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My monitor has free sync enabled, but I do not even have the option to turn on G-Sync from within the NVIDIA Control Panel, and even after I did a fresh driver install.

 

Suggestions?

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Posted · Original PosterOP
4 minutes ago, Bigfootmandude said:

My monitor has free sync enabled, but I do not even have the option to turn on G-Sync from within the NVIDIA Control Panel, and even after I did a fresh driver install.

 

Suggestions?

Do you meet all the requirements listed in the first post?

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1 minute ago, Glenwing said:

Do you meet all the requirements listed in the first post?

Yes, GTX 1080, Displayport, etc. I am wondering if the Displayport is not 1.2 though...

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Samsung SHG50 

 

  • G-SYNC works even when the monitor is set to DP 1.1.
  • It is also recognized in DP 1.2 but doesn't trigger. 
  • At least on Forza Horizon 4, there is very noticeable ghosting, much like very bad and excessive motion blur. 
  • Said ghosting is much improved in FreeSync Ultimate, but is still present and feels less smooth compared to it being disabled. 

Will have to do some more testing. 


Please tag me if you need assistance or if you want me to contribute to a topic 

 

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Intel Core i7 7700HQ | GeForce GTX 1060 6GB | 16GB DDR4-2133 | 128GB SanDisk M.2 SATA SSD + 1TB 7200RPM Hitachi HDD | 15.6" 1080p IPS monitor @ 60Hz w/ G-SYNC | Windows 10 64-bit

 

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Minor updated observations so far, partially previously posted in earlier thread:

 

Acer RT280K (4k60) connected to 2070. Display set to DP1.2. Win10 1809, updated nvidia drivers on the day. Using pendulum test and force enabling FreeSync, I still get tearing at 40 and 60 fps. There was no tearing at 50fps but I get some kind of occasional stutter. I suspect this display might just have a very narrow FreeSync range. Is there a way to find out what the FreeSync range is?

 

I did go back and check that with FreeSync off, V-sync on, there is no stutter.

 

I'll overclock the display later to 72 Hz and see if that helps at all... as well as test it in real games.


Main rig: Asus Maximus VIII Hero, i7-6700k stock, Noctua D14, G.Skill Ripjaws V 3200 2x8GB, Gigabyte GTX 1650, Corsair HX750i, In Win 303 NVIDIA, Samsung SM951 512GB, WD Blue 1TB, HP LP2475W 1200p wide gamut

Gaming system: Asrock Z370 Pro4, i7-8086k stock, Noctua D15, Corsair Vengeance LPX RGB 3000 2x8GB, Gigabyte RTX 2070, Fractal Edison 550W PSU, Corsair 600C, Optane 900p 280GB, Crucial MX200 1TB, Sandisk 960GB, Acer Predator XB241YU 1440p 144Hz G-sync

Ryzen rig: Asrock B450 ITX, R5 3600, Noctua D9L, Corsair Vengeance LPX RGB 3000 2x4GB, EVGA GTX 970, Corsair CX450M, NZXT Manta, Crucial MX300 525GB, Acer RT280K

VR rig: Asus Z170I Pro Gaming, i7-6600k stock, Silverstone TD03-E, Kingston Hyper-X 2666 2x8GB, Zotac 1070 FE, Corsair CX450M, Silverstone SG13, Samsung PM951 256GB, HTC Vive

Gaming laptop: Asus FX503VD, i5-7300HQ, 2x8GB DDR4, GTX 1050, Sandisk 256GB SSD

Total CPU heating: i7-7800X, i7-5930k, i7-5820k, 2x i7-6700k, i7-6700T, i5-6600k, i7-5775C, i5-5675C, i5-4570S, i3-8350k, i3-6100, i3-4360, i3-4150T, E5-2683v3, 2x E5-2650, E5-2667, R7 3700X, R5 3600

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Disappointing that 900-series isn't supported. I don't see why it wouldn't be supported. 


That's an F in the profile pic

 

 

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2 hours ago, Froody129 said:

Disappointing that 900-series isn't supported. I don't see why it wouldn't be supported. 

I haven't verified it yet, but I saw a post elsewhere that suggested Adaptive Sync was added to DP1.2a spec. Does the 900 series support that version? If not, it's a no go.


Main rig: Asus Maximus VIII Hero, i7-6700k stock, Noctua D14, G.Skill Ripjaws V 3200 2x8GB, Gigabyte GTX 1650, Corsair HX750i, In Win 303 NVIDIA, Samsung SM951 512GB, WD Blue 1TB, HP LP2475W 1200p wide gamut

Gaming system: Asrock Z370 Pro4, i7-8086k stock, Noctua D15, Corsair Vengeance LPX RGB 3000 2x8GB, Gigabyte RTX 2070, Fractal Edison 550W PSU, Corsair 600C, Optane 900p 280GB, Crucial MX200 1TB, Sandisk 960GB, Acer Predator XB241YU 1440p 144Hz G-sync

Ryzen rig: Asrock B450 ITX, R5 3600, Noctua D9L, Corsair Vengeance LPX RGB 3000 2x4GB, EVGA GTX 970, Corsair CX450M, NZXT Manta, Crucial MX300 525GB, Acer RT280K

VR rig: Asus Z170I Pro Gaming, i7-6600k stock, Silverstone TD03-E, Kingston Hyper-X 2666 2x8GB, Zotac 1070 FE, Corsair CX450M, Silverstone SG13, Samsung PM951 256GB, HTC Vive

Gaming laptop: Asus FX503VD, i5-7300HQ, 2x8GB DDR4, GTX 1050, Sandisk 256GB SSD

Total CPU heating: i7-7800X, i7-5930k, i7-5820k, 2x i7-6700k, i7-6700T, i5-6600k, i7-5775C, i5-5675C, i5-4570S, i3-8350k, i3-6100, i3-4360, i3-4150T, E5-2683v3, 2x E5-2650, E5-2667, R7 3700X, R5 3600

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Two things I've noticed so far.  My PG279Q monitor is now listed as G-Sync compatible on the NVidia control panel and my MG248Q seems to be holding up nicely when tested with Destiny 2 and Shadow of the Tomb Raider.  I'll run some more testing tonight. 

 

*All testing done using a 1080 and a display port cable


"A promise is a promise"

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Is it possible to maybe have the thread organized more in a way? Like for example, have a list of monitors that work or monitors with issues?

 

Example:

 

Working Dell monitors:

*insert model here that is confirmed to work by nvidia or various users*

 

Dell monitors with issues:

*insert model here, and problem*

 

On another note, has anyone tried the Dell 2719DGF? I've been looking at it for a while


hi

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Undervolting 5700 (not mine but important)

 

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Following intently:

Just built a new rig with a 1070 ti and find it a bit overkill on my 1080p 60hz samsung monitor...

I've been looking at an Acer XB271HU bmiprz, but may be able to save some money/

get something sooner with a Freesync equivalent.


Current System Specs:

MOBO: Gigabyte Aorus Ultra Gaming     CPU: Intel i5 9600k      GPU: EVGA GTX 1070 ti FTW Ultra Silent    PSU: EVGA 750 G2 80+ gold

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Posted · Original PosterOP
22 minutes ago, CorruptedSanity said:

@Glenwing can you add windows 10 to the requirements please. 

Added

22 minutes ago, toobladink said:

Is it possible to maybe have the thread organized more in a way? Like for example, have a list of monitors that work or monitors with issues?

 

Example:

 

Working Dell monitors:

*insert model here that is confirmed to work by nvidia or various users*

 

Dell monitors with issues:

*insert model here, and problem*

 

On another note, has anyone tried the Dell 2719DGF? I've been looking at it for a while

I don't have time to maintain a list, but I added a link to one that's being done on Reddit.

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1 hour ago, porina said:

I haven't verified it yet, but I saw a post elsewhere that suggested Adaptive Sync was added to DP1.2a spec. Does the 900 series support that version? If not, it's a no go.

Seems my card supports DP 1.2, however I'm not sure if that extends to 1.2a. It is apparently also 1.3 and 1.4 "ready" (this is from the Google result so it might be completely wrong. 

 

AMD has supported Freesync on many different connectors for years going back to cards much older than the 900-series. I don't see why Nvidia would lock it down, I guess I can only hope for a future update since I have no need for a different GPU even at 1440p144


That's an F in the profile pic

 

 

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I wonder if this signals the death bells for G-SYNC Monitors with modules for 1440P 144Hz monitors and G-sync will be reserved only for ultra high end HDR panels. I am inclined to believe it will as there is no incentive to manufacturers to put G-Sync on midrange monitors like Asus PG279Q.

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