Rip Gsync (FastSync?)

geordiejc · 18 May 2016 at 23:14

Is this RIP Gsync?

/me waves goodbye to his resale value of 4k gsync

It's not as responsive as vsync off in terms of input lag, but very close and no screen tearing ? - any info on this vs gsync?

Wrinkly · 18 May 2016 at 23:26

Does the same job as Vsync with reduced lag. Gsync is the other half of your video card you never got in the 1st place while Adaptive Sync is a industry standard version of Gsync for people with fully developed cards.

I'll get a sore head if I try to explain it in any more detail

Perfect_Chaos · 18 May 2016 at 23:34

From Gamespot:

With the GTX 1080, Nvidia is also introducing a GPU/display feature called “Fast Sync.” It's a complementary feature to the company’s G-Sync technology, but does not require a G-Sync monitor. The benefits of Fast Sync come into play at the higher end of the performance spectrum, when your GPU is able to render frames faster than your monitor’s refresh rate. Enabling Fast Sync here, in theory, would allow you to get near the low latency of having V-Sync disabled, but without the annoying screen-tearing effects.

So it's only any good if you can drive the FPS above your monitors refresh rate.

geordiejc · 18 May 2016 at 23:36

They claim it reduces input within ~10ms of vsync off but you get no tearing which is a win win!

My question is how does the input latency compare to gsync input latency. Gsync will limit your FPS to the max refresh rate of your monitor, in my case 60.

NirK · 18 May 2016 at 23:39

Its not the same as Gsync at all though...

It will work at the monitor refresh rate eg. 60hz, 144hz or whatever it is....

And your FPS will have to be higher than the monitor refresh rate...

Gsync will sync the monitor to whatever your FPS is from 30-144hz with no tearing or lag.

But yes fast sync looks good if you play CS:GO or something at 300fps and want no tearing or lag, or it might still be better to run at 300fps Vsync off for the lowest possible lag.

But not a replacement for Gsync at all.

Mei · 18 May 2016 at 23:41

geordiejc said:
They claim it reduces input within ~10ms of vsync off but you get no tearing which is a win win!

My question is how does the input latency compare to gsync input latency. Gsync will limit your FPS to the max refresh rate of your monitor, in my case 60.

its prob a little bit less latency than g-sync...hence the name
as i understand it g-sync has to send a ping back, this doesnt

andybird123 · 18 May 2016 at 23:46

Mei said:
its prob a little bit less latency than g-sync...hence the name
as i understand it g-sync has to send a ping back, this doesnt

No, it doesnt.
With gsync the gpu spits the frames at the monitor as fast as it can and then the monitor controller sorts out the rest

That infamous gsync latency test that Linus did, in the video he says he turned vsync on and off in game... thats not how you do it with gsync, it should always be off in game

Mei · 18 May 2016 at 23:52

andybird123 said:
No, it doesnt.
With gsync the gpu spits the frames at the monitor as fast as it can and then the monitor controller sorts out the rest

That infamous gsync latency test that Linus did, in the video he says he turned vsync on and off in game... thats not how you do it with gsync, it should always be off in game

oks! ive learnt not to argue with a guy in sandals
i duno why its called fastsync then! i guess freesync was taken!
<3

geordiejc · 18 May 2016 at 23:53

NirK said:
Its not the same as Gsync at all though...

It will work at the monitor refresh rate eg. 60hz, 144hz or whatever it is....

And your FPS will have to be higher than the monitor refresh rate...

Gsync will sync the monitor to whatever your FPS is from 30-144hz with no tearing or lag.

But yes fast sync looks good if you play CS:GO or something at 300fps and want no tearing or lag, or it might still be better to run at 300fps Vsync off for the lowest possible lag.

But not a replacement for Gsync at all.

I agree with some of what you say. I play cs:go at 60fps/hz gsync. with fast sync you can get 240fps in 4k WITHOUT screen tearing which is essentially what gsync does.

Gsync solved the problem of screen tearing with vsync off and input lag with vsync on. In summary i think the only difference is fast sync wont limit your FPS but will give the same result as gsync.

Legend · 18 May 2016 at 23:53

FastSync...

geordiejc · 19 May 2016 at 00:00

ffs it's a sink body and go faster strips. Can't get the staff these days ...

Greebo · 19 May 2016 at 00:08

From what I read it replaces gsync

geordiejc · 19 May 2016 at 00:15

Greebo said:
From what I read it replaces gsync

I've just been watching this video and the guy explains that fastsync is best used when the render rate is above the refresh rate and gsync is best used when the render rate is below the refresh rate. at the 9min 30 mark.

I still think this could be the end of gsync though!

The thing is .... i have tested cs:go limited to 59fps on my 4k gsync with gsync off and vsync off but the game limited to 59 fps and it isnt anywhere near as smooth as gsync on. This is where gsync comes in i believe.

SkeeterUK · 19 May 2016 at 00:20

Nvm i was wrong about what it was.

geordiejc · 19 May 2016 at 00:23

SkeeterUK said:
Tom peterson said specifically do NOT use fastsync if its above 60fps on a 60hz monitor. So i dunno where people are getting that you need to drive your fps up past what your monitor can do. He said its good for when its under 60fps but not at or over 60. He said this on pcper stream the other day.

Why not if you want to prevent screen tearing and input lag on a 60hz monitor? e.g. i want to play cs:go at 300fps on a 60hz monitor without screen tearing? why not use fastsync as this eliminates screen tearing and the negative impacts of input latency when using vsync?

Mei · 19 May 2016 at 00:33

geordiejc said:
I still think this could be the end of gsync though!

lol u should put on some face protection! >.<

thenoseknows · 19 May 2016 at 01:10

This doesn't replace GSync. FastSync is used to eliminate screen tearing in situations where the game's framerate is far greater than the monitor's refresh rate, but without the input lag of VSync. The feature is built into the card and does not require a monitor with special hardware. Unlike Gsync, you cannot use FastSync in situations where the framerate dips below the refresh rate, as that will only lead to stuttering, just like Vsync.

Legend said:
FastSync...

No. No, you are not allowed to do that.

geordiejc · 19 May 2016 at 01:18

thenoseknows said:
This doesn't replace GSync. FastSync is used to eliminate screen tearing in situations where the game's framerate is far greater than the monitor's refresh rate, but without the input lag of VSync. The feature is built into the card and does not require a monitor with special hardware. Unlike Gsync, you cannot use FastSync in situations where the framerate dips below the refresh rate, as that will only lead to stuttering, just like Vsync.

No. No, you are not allowed to do that.

Ah so.... fastsync can't work when render rate is below refresh rate as this causes stuttering, which gsync resolves.

Sin_Chase · 19 May 2016 at 03:13

Wrinkly said:
Does the same job as Vsync with reduced lag. Gsync is the other half of your video card you never got in the 1st place while Adaptive Sync is a industry standard version of Gsync for people with fully developed cards.

I'll get a sore head if I try to explain it in any more detail

I already get a sore head trying to decipher your posts :confused:

Panos · 19 May 2016 at 05:40

Why I am the only one that sees VESA's Adaptive Sync description from NV? Or more commonly named Freesync?