Nvidia G-Sync

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G-Sync is a proprietary adaptive sync technology developed by Nvidia aimed primarily at eliminating screen tearing and the need for software alternatives such as Vsync. [1] G-Sync eliminates screen tearing by allowing a video display's refresh rate to adapt to the frame rate of the outputting device (graphics card/integrated graphics) rather than the outputting device adapting to the display, which could traditionally be refreshed halfway through the process of a frame being output by the device, resulting in screen tearing, or two or more frames being shown at once. [2] In order for a device to use G-Sync, it must contain a proprietary G-Sync module sold by Nvidia. AMD has released a similar technology for displays, called FreeSync, which has the same function as G-Sync yet is royalty-free.

Contents

Nvidia built a special collision avoidance feature to avoid the eventuality of a new frame being ready while a duplicate is being drawn on screen (something that could generate lag and/or stutter) in which case the module anticipates the refresh and waits for the next frame to be completed. [3] Overdriving pixels also becomes tricky in a non-fixed refresh scenario, and solutions predicting when the next refresh is going to happen and accordingly adjusting the overdrive value must be implemented and tuned for each panel in order to avoid ghosting. [4]

Hardware

The module carries all the functional parts. It is based around an Altera Arria V GX family FPGA featuring 156K logic elements, 396 DSP blocks and 67 LVDS channels. It is produced on the TSMC 28LP process and paired with three DDR3L DRAM chips to attain a certain bandwidth, for an aggregate 768 MB capacity. The employed FPGA also features a LVDS interface to drive the monitor panel. It is meant to replace common scalers and be easily integrated by monitor manufacturers, who only have to take care of the power delivery circuit board and input connections. [5]

GPU:

Driver:

Operating system:

System requirement:

Monitor:

Criticism

G-Sync faces some criticism[ from whom? ] due to its proprietary nature and the fact that it is still being promoted when free alternatives exist, such as the VESA standard Adaptive-Sync which is an optional feature of DisplayPort version 1.2a. [7] While AMD's FreeSync relies on the above-mentioned optional component of DisplayPort 1.2a, G-Sync requires an Nvidia-made module in place of the usual scaler in the display in order for it to function properly with select Nvidia GeForce graphics cards, such as the ones from the GeForce 10 series (Pascal). [6] However, there do exist G-Sync compatible monitors that can also utilize AMD's FreeSync. [8] The G-Sync module itself has also been criticized for drawing power when the monitor is switched off, while comparable technologies don't draw any power when the monitor is switched off. [9] A basic test by technology YouTuber JayzTwoCents showed that monitors with the G-Sync module draw approximately 14W continuously when the monitor is off, and that comparable monitors without the G-Sync module draw 0.0W when the monitor is off. [9]

List of G-Sync-enabled monitors

BrandModel numberRelease yearResolutionSizeRefresh rate at native resolutionPanel technology
AcerX34 Predator20153440x144034100 HzIPS
AcerXB270H20141920x108027"144 HzTN
AcerXB270HA20141920x108027"144 HzTN
AcerXB280HK20143840x216028"60 HzTN
AcerXB281HK20153840x216028"60 HzTN
AcerXB271HK20163840x216027"60 HzIPS
AcerXB321HK20163840x216032"60 HzIPS
AcerXB240HA20151920x108024"144 HzTN
AcerXB241H20161920x108024"144 Hz (180 Hz overclocked)TN
AcerXB241YU20162560x144023.8"144 Hz (165 Hz overclocked)TN
AcerXB252Q20171920x108024.5"240 HzTN
AcerXB270HU20152560x144027"144 HzIPS (AHVA)
AcerXB271HU20162560x144027"144 Hz (165 Hz overclocked)IPS (AHVA)
AcerXB271HUA20162560x144027"144 Hz (165 Hz overclocked)TN
AcerXB27220171920x108027"240 HzTN
AcerX3420153440x144034"60 Hz (100 Hz overclocked)IPS
AcerZ27120161920x108027"144 HzVA
AcerZ301C20162560x108029.5"144 Hz (200 Hz overclocked)VA
AcerZ3520162560x108035"144~200 HzVA
AOCG2460PG20141920x108024"144 HzTN
AOCAG271QG20162560x144027"165 HzIPS (AHVA)
AOCAG271UG20173840x216027"60 HzIPS
AOCAG352UCG20173440x144035"100 HzVA
AsusPG348Q20163440x144034"100 HzIPS
AsusPG278Q20142560x144027"144 HzTN
AsusPG278QR20162560x144027"165 HzTN
AsusPG279Q20152560x144027"144 Hz (165 Hz overclocked)IPS (AHVA)
AsusPG27AQ20153840x216027"60 HzIPS
AsusPG27UQ20183840x216027"144 HzIPS (HDR)
AsusPG248Q20161920x108024"144 Hz (180 Hz overclocked)TN
AsusPG258Q20161920x108024.5"240 HzTN
BenQXL2420G20151920x108024"144 HzTN
DellAW3418DW20173440x144034"100 Hz (120 Hz overclocked)IPS
DellAW2721D [10] 20202560x144027"240 HzIPS
DellAW3418HW20172560x108034"144 Hz (160 Hz overclocked)IPS
DellS2716DG20162560x144027"144 HzTN
DellS2417DG20162560x144024"144 Hz (165 Hz overclocked)TN
HPOmen X 3520173440x144035"100 HzVA
Philips272G5DYEB20141920x108027"144 HzTN
LG32GK850G-B20172560x144032"144 Hz (165 Hz overclocked)VA
LG34UC89G-B20172560x108034"144 Hz (166 Hz overclocked)IPS
ViewSonicXG2703-GS20162560x144027"144 Hz (165 Hz overclocked)IPS (AHVA)

[11]

List of upcoming G-Sync-enabled monitors

BrandModel numberResolutionSizeRefresh rate at native resolutionHDRPanel technology
AcerXB272-HDR3840x216027"144 HzYesIPS
AcerX353440×144035"200 Hz overclockedYesVA
AcerPredator BFGD3840×216065"120 Hz overclockedYes ?
AOCAG273UG3840x216027"144 HzYesIPS
AOCAG273QCG2560x144027"165 HzNoTN
AOCAG353UCG3440×144035"200 Hz overclockedYesVA
AsusPG35VQ3440x144035"200 HzYesAMVA?
AsusPG653840×216065"120 Hz overclockedYes ?
HPOMEN X 653840×216065"120 Hz overclockedYes ?

List of G-Sync enabled desktop GPUs

Architecture
KeplerKepler (refresh)MaxwellPascalVoltaTuringAmpereAda Lovelace
GeForce GTX 650 Ti BoostGeForce GTX 760GeForce GTX 745GeForce GT 1030 [12] Titan VGeForce GTX 1650GeForce RTX 3050GeForce RTX 4060
GeForce GTX 660GeForce GTX 770GeForce GTX 750GeForce GTX 1050GeForce GTX 1650 SuperGeForce RTX 3060GeForce RTX 4060 Ti
GeForce GTX 660 TiGeForce GTX 780GeForce GTX 750 TiGeForce GTX 1050 TiGeForce GTX 1660GeForce RTX 3060 TiGeForce RTX 4070
GeForce GTX 670GeForce GTX 780 TiGeForce GTX 950GeForce GTX 1060GeForce RTX 1660 TiGeForce RTX 3070GeForce RTX 4070 Ti
GeForce GTX 680GeForce GTX TitanGeForce GTX 960GeForce GTX 1070GeForce RTX 2060GeForce RTX 3070 TiGeForce RTX 4080
GeForce GTX 690GeForce GTX Titan BlackGeForce GTX 965MGeForce GTX 1070 TiGeForce RTX 2060 SuperGeForce RTX 3080GeForce RTX 4090
GeForce GTX Titan ZGeForce GTX 970GeForce GTX 1080GeForce RTX 2070GeForce RTX 3080 Ti
GeForce GTX 970MGeForce GTX 1080 TiGeForce RTX 2070 SuperGeForce RTX 3090
GeForce GTX 980Titan XGeForce RTX 2080GeForce RTX 3090 Ti
GeForce GTX 980MTitan XpGeForce RTX 2080 Super
GeForce GTX 980 TiGeForce RTX 2080 Ti
GeForce GTX Titan XRTX Titan

G-Sync notebook

Nvidia announced that G-Sync will be available to notebook manufacturers and that in this case, it would not require a special module since the GPU is directly connected to the display without a scaler in between. According to Nvidia, fine tuning is still possible given the fact that all notebooks of the same model will have the same LCD panel, variable overdrive will be calculated by shaders running on the GPU, and a form of frame collision avoidance will also be implemented. [4]

"Big Format" gaming displays

At CES 2018 Nvidia announced a line of large gaming monitors built by HP, Asus and Acer with 65-inch panels, 4K, HDR, as well as G-Sync support. The inclusion of G-Sync modules make the monitors among the first TV-sized displays to feature variable refresh-rates. [13]

G-Sync Compatible displays

At CES 2019, Nvidia announced that they will support variable refresh rate monitors with FreeSync technology under a new standard named G-Sync Compatible. All monitors under this new standard have been tested by Nvidia to meet their baseline requirements for variable refresh rate and will enable G-Sync automatically when used with an Nvidia GPU. [14] However, users with any FreeSync monitor, including those that are not officially certified may choose to enable the G-Sync option in the Nvidia Control Panel. [15] Unlike G-Sync, G-Sync Compatible displays are only compatible with the GTX 10-series and onwards. [16]

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A graphics card is a computer expansion card that generates a feed of graphics output to a display device such as a monitor. Graphics cards are sometimes called discrete or dedicated graphics cards to emphasize their distinction to integrated graphics processor on the motherboard or the CPU. A graphics processing unit (GPU) that performs the necessary computations is the main component in a graphics card, but the acronym "GPU" is sometimes also used to erroneously refer to the graphics card as a whole.

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References

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  5. "NVIDIA G-Sync Review".
  6. 1 2 "What are the system requirements for G-sync Compatible display technology? | NVIDIA".
  7. Scott Wasson (12 May 2014). "Adaptive-Sync added to DisplayPort spec". The Tech Report. Retrieved 29 May 2015.
  8. "How to Run G-Sync on a FreeSync Monitor". 18 January 2021.
  9. 1 2 JayzTwoCents (1 Aug 2021). "Will California Ban Gaming Monitors? Explaining the New Monitor Law". YouTube . Retrieved 29 Dec 2021.
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  15. Castle, Katharine (2020-06-15). "Here's a list of all the Nvidia G-Sync Compatible monitors confirmed so far". Rock, Paper, Shotgun. Retrieved 2020-06-25.
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