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Question about G-Sync

I

IsaacMM

Gawd
Joined
Jun 9, 2008
Messages
646
Been out of the loop for a while, but if I understand correctly, G-Sync only proves advantageous if your video card can output more fps than your monitor can handle, is that correct?

What if your video card cannot deliver more framerates than your monitor, say you have a 60 Hz monitor but you card only outputs an average of 50fps. Does G-Sync do anything in this case?
 
Where did you get these ideas???

IsaacMM said:
Been out of the loop for a while, but if I understand correctly, G-Sync only proves advantageous if your video card can output more fps than your monitor can handle, is that correct?
Click to expand...
Completely wrong.

IsaacMM said:
What if your video card cannot deliver more framerates than your monitor, say you have a 60 Hz monitor but you card only outputs an average of 50fps. Does G-Sync do anything in this case?
Click to expand...
That's when gsync is the most beneficial.
 
sharknice said:
Where did you get these ideas???


Completely wrong.


That's when gsync is the most beneficial.
Click to expand...

I had in my mind that screen tearing was what V-sync worked against, and screen tearing happens when your fps is higher than the monitor's refresh rate.

Would you happen to know where I can find a detailed article explaining everything, I have looked but everything I found was superficial explanations.
 
GSync allows the GPU to control when the next frame is displayed instead of a fixed interval controlled by the monitor.

Basically as soon as the GPU finishes rendering the frame it's sent to the monitor and displayed. So you don't get any tearing or stuttering without any additional input lag. With gsync everything looks super smooth no matter how inconsistent the framerate is.

There are limits to how fast a monitor can display new images though. For example a 240hz gsync monitor can still only display 240 fps. So if you're getting a frame rate over 240 fps gsync falls back to regular vsync or no sync (whichever you have set). You can avoid this by capping the framerate in the game settings.
 
sharknice said:
GSync allows the GPU to control when the next frame is displayed instead of a fixed interval controlled by the monitor.

Basically as soon as the GPU finishes rendering the frame it's sent to the monitor and displayed. So you don't get any tearing or stuttering without any additional input lag. With gsync everything looks super smooth no matter how inconsistent the framerate is.

There are limits to how fast a monitor can display new images though. For example a 240hz gsync monitor can still only display 240 fps. So if you're getting a frame rate over 240 fps gsync falls back to regular vsync or no sync (whichever you have set). You can avoid this by capping the framerate in the game settings.
Click to expand...


So if I have a 60hz monitor with G-sync and I am running a game with 70 fps, I am better off turning the quality up higher to get for example 50fps, rather than keep running it at 70 fps?
 
IsaacMM said:
Been out of the loop for a while, but if I understand correctly, G-Sync only proves advantageous if your video card can output more fps than your monitor can handle, is that correct?

What if your video card cannot deliver more framerates than your monitor, say you have a 60 Hz monitor but you card only outputs an average of 50fps. Does G-Sync do anything in this case?
Click to expand...

Opposite.

Generally completely removes screen tearing.
 
IsaacMM said:
So if I have a 60hz monitor with G-sync and I am running a game with 70 fps, I am better off turning the quality up higher to get for example 50fps, rather than keep running it at 70 fps?
Click to expand...

Yep
 
.......G-sync.

G-force <videocard> synchronization

Video card synchronizes with monitor so everything displays in step with each other.

Eliminates artifacts that occur when videocard sends signal that the monitor has to wait for or already expected.

Like goose stepping of N.Korea soldiers (bad analogy).
 
IsaacMM said:
I had in my mind that screen tearing was what V-sync worked against, and screen tearing happens when your fps is higher than the monitor's refresh rate.

Would you happen to know where I can find a detailed article explaining everything, I have looked but everything I found was superficial explanations.
Click to expand...
Tearing happens when the frames being displayed are out of sync with the monitor's static refresh rate. G-Sync eliminates this issue by making the monitor's refresh rate variable, so it displays every frame as it is ready up to the monitor's maximum refresh rate.

Blur Busters has a comprehensive article on what G-Sync is and how best to use it.
https://www.blurbusters.com/gsync/gsync101-input-lag-tests-and-settings/

I have a 144 Hz monitor and typically my games are running at 70-110 FPS with G-Sync.

NVIDIA used to have a good article as well, but I can't find it anymore. The slides they have visualize what happens really well, though.

upload_2018-2-2_15-55-16.png

upload_2018-2-2_15-54-48.png

upload_2018-2-2_15-55-42.png
 
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