This Setting is Ruining Your PC - Gsync/Freesync & FPS Caps

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This Setting is Ruining Your PC - Gsync/Freesync & FPS Caps
Over 90% of you watching right now are almost certainly using settings that either make your display look way worse, massively increase your latency, or both… Let’s talk about it

Now, before we get into this trust me favorite this video right now, because believe me you’re going to want to come back to this one time and time again as this video is my magnum opus of the over a year of latency and motion testing I’ve been doing on dozens of displays using both Nvidia and AMD GPUs with a 1000fps camera, and what I’ve found is going to shock you, as it turns out when set up correctly you can actually have far lower latency and a better image in motion all while using less PC resources.

How, well it all has to do with sending the fastest, most up to date frame your PC can produce without tearing, and unfortunately the default settings for GPUs and games don’t allow this to happen, and most advice on settings people give is also incorrect.

Now this journey all started with me testing various fps caps and Nvidia control panel settings, and what I found was that yes the old adage of Vsync adding tremendous latency in games was true, however at the time I also found that Gsyc+Vsync in the Nvidia control panel +Reflex in game could actually lead to far less input delay on many games and in fact was overall better than using an external cap in the driver or Riva Tuner Statistics Server to set a global limit.

Not only that, but you would also get a tear free experience using these settings and it could actually be even faster than no fps cap as when you are heavily GPU bound this can actually increase latency.

However, viewers then pointed out that external caps can have higher latency than in game caps, so I went to investigate this claim now using an AMD GPU and I found that they were actually correct. In-game caps led to far lower latency than any other method.

However I still hadn’t had a chance to revisit this on Nvidia GPUs to see if this is actually better than Gsync+Vsync+Reflex, so I recently did just that.

Now for these tests I ran 3 different configurations on a 138Hz OLED monitor.

Gsync+Vsync+ULLM
Gsync+Vsync+Reflex
Gsync+Vsync+133fps cap
Gsync+120fps cap as in my testing it turns out that VRR used in Gsync and Freesync monitors actually needs 1ms of time to fully work.

What I mean by this is for you to get 0 perceivable tearing you must add an additional ms of latency to give the display more time to process.

This is done by first getting the latency of your monitor which for me as an example would be to take 1000ms / 138fps to get 7.246ms of total latency.

You then add 1ms to this number which would give us 8.246ms of total latency, and to understand what frame rate that is, we simply take 1000ms again / this new latency which gives us 121.27fps, however I then round down to the nearest even number to give it a little headroom, which means that actually the max framerate we can run on a 138Hz display is 120fps.

Other common refresh rates would look like this

240Hz = 192fps
144Hz = 124fps
120Hz = 106fps

When I was testing AMD GPUs I found that If you don’t do this you will likely see slight tears at the bottom of your screen which can make the display look weird and throw you off when you're playing a competitive game.

However on an Nvidia GPU I found that if you combine Gsync+Vsync you actually only need to add 0.3ms of latency for VRR to work correctly

240Hz = 223fps
144Hz = 138fps
120Hz = 115fps

so in theory unless AMD can also do the same thing, Nvidia may be able to deliver higher untorn framerates, but that’s only if the latency is still good, so let’s find out.

FULL DISCLOSURE
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END DISCLOSURE

Specs

Music
Outro: Everyone by Monplaisir

[GraphicallyChallenged]

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Thank you for watching!

[FallensAnger]

This is just so much misinformation and don't give context on what this settings do, what they are ment for and what you need to have, and also it depends what api is running.

[georgesmith]

I was perfectly comfortable building my first PC one month ago and installing windows. Adjusting all the software crap afterwards is when the headache began 😂

[ONMUSH]

Can you show where did you find the 0, 3ms required to gsync (also 1ms rule)? Is the first time I ear this.

[Berkelll]

What happens if i have vsync off in both nvidia control panel and game while having gsync on and still not passing more fps than refresh rate? Like i'm having 180hz monitor, but not passing 180fps for example. Does G-Sync still works properly or it NEEDS to have vsync in control panel to work?

[Akgis]

Was the games that you used ULLM DX12 by chance? ULLM until very recently started to work with DX12

[Abfahrt]

But doesn't lead g-sync + fps cap to much more noticable fps drops? I mean if fps drop from 140 to 80 is more noticable then a drop of 180 to 120 or am i wrong? (İ'm playing CS2 & CoD WZ)

[xmusou]

so turn ullm off. but what about regular llm? keep that on or what?

[ryugaroxas]

So can i use g sync v sync ullm and fps cap ? Or only 1 of ullm and fps cap only ?

[hatty]

I have legion 5 pro 2021 model 3070 and 5800H 32gb ram.
do i have vrr? what if i dont have vrr? what would be the diffirence?

[KevinJohn]

On my VRR 240hz display vsync only make sense if i come close or over 240fps isnt it?

[casluRD]

In this case, for 240hz im need a g sync on, v sync on, nvidia reflex on (not on+boost) and cap a fps to 223?

[stargirl]

my problem is not here
can somebody tell me why it shuts down when i select resolution from 1080p to 4k in last of us and
VRAM goes to 9/8gb, my card has 8gb, 5700xt.
as soon as i click accept settings
it shuts down
i heard that going over vram limit is safe 😥
what could be making system crash. Windows uses RAM not VRAM right?

[diabolique]

what abot the situation in wich you can't reach max frame rate in the game. Mine is 165hz wich is alot more then my desired stable 75hz. What you recomand?

[cfalvealm]

Nice vid!!! I just started this journey on software “setup” for gaming as I always thought that having powerful hardware was enough😢. So just two days ago I was trying out rivatuner … sorry if my English is not that good but, this video says that it’s better to do this(what’s in the video) or use riva. Thanks for help mates!

[JStevensdk]

I have a 4090 with 10850K and in Fortnite at 1440P DX11 mode dlss quality, while my CPU and GPU were both not going over 40% utilization at any point, I was still getting many frame time spikes. Using RTSS to cap below my 144mhz monitor helped tremendously. Setting in game to 144 didn't do work. I would have to set down to 120 as FN doesn't allow for single digit increments while RTSS does.

Question, what is causing the frame time spikes? Have a good m.2, ram is only 4800 but dominator. Where is the bottleneck happening causing the frame time spikes? How to tell? No idea I cannot tell. Internet is 500gbs fiber and in game Ms is from 20-30ms. Running uncapped either in DX11 or performance mode gave horrible tearing.

Personally I will take higher input delay over tearing and frame time spikes.

[olafursigurbjornsson]

so i should use Gsync with vertical sync off and cap framerate to 239 on 244hz monitor ?

[nottcyber]

so v sync is good now? also how does this apply to dyac

[SKLLZTHATKILLZ]

so for simplicity you can just use the in-game cap? seems like it had negligible difference than the vsync combos...

[kyledulay]

Should i run settings like this when i play league of legends, fornite, valorant, and some open world mmo?