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Nvidia is ditching dedicated G-Sync modules to push back against FreeSync’s ubiquity (arstechnica.com)

submitted 2 months ago by [email protected] to c/[email protected]

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Back in 2013, Nvidia introduced a new technology called G-Sync to eliminate screen tearing and stuttering effects and reduce input lag when playing PC games. The company accomplished this by tying your display's refresh rate to the actual frame rate of the game you were playing, and similar variable refresh-rate (VRR) technology has become a mainstay even in budget monitors and TVs today.

The issue for Nvidia is that G-Sync isn't what has been driving most of that adoption. G-Sync has always required extra dedicated hardware inside of displays, increasing the costs for both users and monitor manufacturers. The VRR technology in most low-end to mid-range screens these days is usually some version of the royalty-free AMD FreeSync or the similar VESA Adaptive-Sync standard, both of which provide G-Sync's most important features without requiring extra hardware. Nvidia more or less acknowledged that the free-to-use, cheap-to-implement VRR technologies had won in 2019 when it announced its "G-Sync Compatible" certification tier for FreeSync monitors. The list of G-Sync Compatible screens now vastly outnumbers the list of G-Sync and G-Sync Ultimate screens.

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[–] [email protected] 77 points 2 months ago (6 children)

VESA Adaptive-Sync goes back to the eDP stardard, 2009. AMD simply took that and said "Hey why aren't we doing that over external DisplayPort". And they did.

So instead of over-engineering a solution that nobody asked for to create vendor lock-in nobody (but fanboys with Stockholm Syndrome) want they exposed functionality that many many panels already had, anyway, because manufactures don't use completely different control circuitry for laptop (eDP) and stand-alone monitors.

And, no, nvidia's tech is not superior. From what I gather they have stricter certification requirements but that's it.

[–] [email protected] 7 points 2 months ago (5 children)

Gsync modules have a lower sync window before LFC kicks in (usually around 30), and faster pixel response (overdrive) anywhere in the sync window. Those are benefits for both high framerate content and low framerate content.

Even today freesync usually bottoms out around 48. That constantly puts you at the LFC boundary for a lot of AAA games if youre on a popular midrange graphics card and aiming for 60fps average.

[–] [email protected] 4 points 2 months ago (1 children)

Is a problem that LFC is used? As it only duplicate frames.

When the framerate drops below the minimum refresh rate of the display, frames are duplicated and displayed multiple times so that they can sync to a refresh rate that is within the displays refresh rate range. For example, a display with a 60 – 144Hz refresh rate, would be able to sync the frames of a game running at 40 FPS, by doubling them so that the display could sync and run at 80 Hz. A display with LFC effectively results in the removal of the minimum refresh rate boundary.

https://www.amd.com/en/products/graphics/technologies/freesync.html

[–] [email protected] 1 points 2 months ago

With constant frametime its fine, but games don't have constant frametime which is the whole point of vrr in the first place.

https://forums.blurbusters.com/viewtopic.php?t=6524

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