[SOLVED] Noob questions on Gsync and Freesync

[eli150]

Hey guys,

I'm going to get my first monitor that supports adaptive sync. It's a Freesync monitor but it's also Gsync compatible.
I got a few things i want to understand about it and i couldn't really find the answers i was looking for so i'm hoping you guys can help me.

My gpu is a GTX 1070 ti so i'm guessing i wont be able to turn on Freesync but i will be able to turn on Gsync from the Nvidia control panel.

When using this setting do i need to make sure Vsync isn't turned on?
Can i use Gsync and still lock my fps with RTSS or in game options?

The monitor wont support Gsync at 30hz because the range is 48-144. Will i have to disable the setting when i want a locked 30fps?
I know this might surprise some of you but i'm asking this because there are some cases where 30 fps lock will be better.. Like in Batman Arkham Knight and maybe Red Dead Redemption 2.. really hard to get to 60fps with that game from what i've seen.

 

[Eximo]

1. Yes, you will enable G-sync through the Nvidia control panel
2. Not 100% sure with G-Sync compatible, but with G-sync the following applies:

a) G-Sync + V-sync on = 48-144hz with G-sync on, it will not exceed 144hz
b) G-Sync with V-sync off = 48-144hz with G-Sync on, after that it will render as many frames
as possible with syncing off.
c) Sync will not work below 48 FPS obviously, not even sure G-syncs' default to double up on frames applies (Adaptive V-Sync).
3) To get a locked 30hz, just set that refresh rate in Windows and turn V-Sync on. Or use the game to cap it at 30FPS.

 

[eli150]

1. Yes, you will enable G-sync through the Nvidia control panel
2. Not 100% sure with G-Sync compatible, but with G-sync the following applies:

a) G-Sync + V-sync on = 48-144hz with G-sync on, it will not exceed 144hz
b) G-Sync with V-sync off = 48-144hz with G-Sync on, after that it will render as many frames
as possible with syncing off.
c) Sync will not work below 48 FPS obviously, not even sure G-syncs' default to double up on frames applies (Adaptive V-Sync).
3) To get a locked 30hz, just set that refresh rate in Windows and turn V-Sync on. Or use the game to cap it at 30FPS.

Thanks Dude!!!

Is there a reason to use Gsync with Vsync? Maybe just to cap the framerate?

 

[Eximo]

Yes, literally that. No reason to have 300+ FPS when you get close to a wall or something. Just extra heat on the GPU that might reduce your frame rate for something that your system can't quite handle.

Ideally you pick your settings for each game such that your average frame rate hovers around the monitors capabilities. Unless you are going for maximum response time, in which case syncing should be off anyway.

 

[eli150]

Yes, literally that. No reason to have 300+ FPS when you get close to a wall or something. Just extra heat on the GPU that might reduce your frame rate for something that your system can't quite handle.

Ideally you pick your settings for each game such that your average frame rate hovers around the monitors capabilities. Unless you are going for maximum response time, in which case syncing should be off anyway.

So both Gsync and Vsync reduce response times? Is it noticeable?
I guess that i won't really run games at 144hz any time soon because i usually play demanding games. My highest will probably be 90-100fps

Btw, the monitor arrived. It looks amazing and i'm very glad i followed the advice you gave me on my other thread. 1440p looks really good. Way better than i thought it would look. That said, there might be a problem. I'm not sure but the display might suffer from backlight bleed - didnt even know that was a thing before i bought the display. Is there anyway to properly test my display? Do all IPS panels suffer from this? Really prefer not to send it back to amazon but if it turns out to be a problem im definitely returning the display

 

[Eximo]

In the above I was referring to human response time. Sync increases input lag, basically waiting for the appropriate moment to draw a frame rather than just pulling whatever is in the buffer and drawing that. Competitive gamers don't run sync so that the information is as up to date as possible. 100+ hz monitors counteract this increase by being faster and having more opportunities to draw a frame. So even with sync the average input lag time on a high refresh rate monitor will be better than the typical 60hz. Response times of the panel more come down to its technology. TN being extremely fast, VA being a typical middle ground, and IPS/PLS coming in last. Though most panels are now bragging 1ms response times. Not sure anyone has done a good round up of actually measuring them to see if they are even close to truthful.

Backlight bleed is significantly different from what is known as IPS glow.

Backlight bleed would be extreme dis-uniformity. Bright spots, discoloration. If you just see a bluish or yellowish glow at the edges when the screen is completely dark, that is sort of how the backlight works.

Backlight bleed can be lived with, my monitor has it, only noticeable if you look for it.

Here's an example of unacceptable backlight bleed. Note this is a lit room:

https://imgur.com/a/63md3

View: https://imgur.com/gallery/63md3


Here is mine, note how dark it is just to capture it. Only really obvious when there is something dark being displayed in the lower right corner:

https://imgur.com/a/GSv7lAf

View: https://imgur.com/gallery/GSv7lAf


I didn't find it too distasteful, so have kept it.

 

[eli150]

In the above I was referring to human response time. Sync increases input lag, basically waiting for the appropriate moment to draw a frame rather than just pulling whatever is in the buffer and drawing that. Competitive gamers don't run sync so that the information is as up to date as possible. 100+ hz monitors counteract this increase by being faster and having more opportunities to draw a frame. So even with sync the average input lag time on a high refresh rate monitor will be better than the typical 60hz. Response times of the panel more come down to its technology. TN being extremely fast, VA being a typical middle ground, and IPS/PLS coming in last. Though most panels are now bragging 1ms response times. Not sure anyone has done a good round up of actually measuring them to see if they are even close to truthful.

Backlight bleed is significantly different from what is known as IPS glow.

Backlight bleed would be extreme dis-uniformity. Bright spots, discoloration. If you just see a bluish or yellowish glow at the edges when the screen is completely dark, that is sort of how the backlight works.

Backlight bleed can be lived with, my monitor has it, only noticeable if you look for it.

Here's an example of unacceptable backlight bleed. Note this is a lit room:

https://imgur.com/a/63md3

View: https://imgur.com/gallery/63md3


Here is mine, note how dark it is just to capture it. Only really obvious when there is something dark being displayed in the lower right corner:

https://imgur.com/a/GSv7lAf

View: https://imgur.com/gallery/GSv7lAf


I didn't find it too distasteful, so have kept it.

You are like the Guru of Displays 😉

Thank you very much i needed that to better understand what is going on with my display. I think it might just be the glow and it's not that bad.. mainly noticeable in the lower left and right corners. When i move around i don't really see it so i guess that is just something that comes with IPS displays. Also, It's not yellow or blue, more of a whiteish light.

I'm happy i listened to your advice. Going for a 1440p IPS display was the right choice. This is the one i have:

https://pcpartpicker.com/product/6XPgXL/lg-27gl850-b-270-2560x1440-144-hz-monitor-27gl850-b

Btw, It's not really 1ms but it's fast enough. Dont this there is a ture 1ms display right now. I guess i'll try to keep Gsync always on.. I really really hate tearing