Does vertical scan frequency range impact gaming performance?

[derekchan]

A monitor

vertical scan frequency:24-61hz

frame Synchronization mode :23.75-30.5hz, 47.5-61hz

 

B monitor

vertical scan frequency:59-61hz

frame Synchronization mode :59-61hz

 

Does wide scan range matter?

what does frame Synchronization mode do ? 

If i can choose multi refresh rate for a monitor on nvidia control panel,Does it mean the monitor can shift to multi refresh rate ?

But rtings if you playback a 24p video on a 120hz tv, it will dulplicate the frame to match the native refresh rate of the display.

Which one is true?

There is spec info of sony bvm

Panel frame rate

48 Hz / 50 Hz / 60 Hz
(48 Hz and 60 Hz are also compatible with 1/1.001 frame rates)

apparently you can duplicate frame from 50 to match 60

[Eigenvektor]

The refresh rate of your monitor has zero impact on gaming performance whatsoever, unless you enable V-Sync to purposely limit the GPU's render rate to the display's refresh rate.

 

21 minutes ago, derekchan said:

If i can choose multi refresh rate for a monitor on nvidia control panel,Does it mean the monitor can shift to multi refresh rate ?

Yes. The control panel should only list settings the monitor supports.

 

22 minutes ago, derekchan said:

But rtings if you playback a 24p video on a 120hz tv, it will dulplicate the frame to match the native refresh rate of the display.

"duplicate" in this instance means it shows you the same frame multiple times. 120 / 24 = 5. That means the monitor shows you the first frame 5 times, then the second frame 5 times, then the third and so on…

 

That allows the monitor to run at its native 120 Hz, while the source only provides new frames at 1/5th of that rate

[derekchan]

23 hours ago, Eigenvektor said:

The refresh rate of your monitor has zero impact on gaming performance whatsoever, unless you enable V-Sync to purposely limit the GPU's render rate to the display's refresh rate.

 

Yes. The control panel should only list settings the monitor supports.

 

"duplicate" in this instance means it shows you the same frame multiple times. 120 / 24 = 5. That means the monitor shows you the first frame 5 times, then the second frame 5 times, then the third and so on…

 

That allows the monitor to run at its native 120 Hz, while the source only provides new frames at 1/5th of that rate

thank you 

can i ask few more question about vrr?

1.why does frame synchronization like g sync hdmi vrr called variable refresh rate?

lcd and oled display have a static refresh cycle such as 60hz or 120hz.

They will refresh the static cycle no matter how many fps that the gpu render.

The monitor will not change its refresh cycle in real time according to the fps output of the graphics card.

 

2.If the display does not support G-Sync Fast Sync like Steam Deck, can I enable borderless windows in the game interface as a replacement?

 

3.In recent years, OLED displays such as AW3423DW lack BFI function. Can NVIDIA Control Panel's ULMB be used to replace the hardware BFI of LG OLED TV? Is ULMB a software BFI?

[Eigenvektor]

7 hours ago, derekchan said:

1.why does frame synchronization like g sync hdmi vrr called variable refresh rate?

lcd and oled display have a static refresh cycle such as 60hz or 120hz.

They will refresh the static cycle no matter how many fps that the gpu render.

The monitor will not change its refresh cycle in real time according to the fps output of the graphics card.

No, some of them don't. The monitor adapting its refresh rate is the whole point of this tech. That requires a monitor that supports Adaptive Sync (i.e. Nvidia's proprietary G-Sync or AMD's FreeSync)

 

V-Sync = GPU synchronizes its frame rate to the monitor's refresh rate (within its performance limits)

 

VRR = Monitor synchronizes its refresh rate to the GPU's frame rate (within its hardware limits)

 

7 hours ago, derekchan said:

2.If the display does not support G-Sync Fast Sync like Steam Deck, can I enable borderless windows in the game interface as a replacement?

Borderless Window, G-Sync and Fast Sync are unrelated technologies. So no.

 

7 hours ago, derekchan said:

3.In recent years, OLED displays such as AW3423DW lack BFI function. Can NVIDIA Control Panel's ULMB be used to replace the hardware BFI of LG OLED TV? Is ULMB a software BFI?

From what I can find ULMB is a hardware solution proprietary to Nvidia's G-Sync monitors that does backlight strobing

 

So I would assume enabling it only works if the monitor is compatible.

 

The effect should be similar to BFI, though the way it works is different.

[derekchan]

On 6/25/2025 at 10:32 PM, Eigenvektor said:

No, some of them don't. The monitor adapting its refresh rate is the whole point of this tech. That requires a monitor that supports Adaptive Sync (i.e. Nvidia's proprietary G-Sync or AMD's FreeSync)

 

V-Sync = GPU synchronizes its frame rate to the monitor's refresh rate (within its performance limits)

 

VRR = Monitor synchronizes its refresh rate to the GPU's frame rate (within its hardware limits)

 

Borderless Window, G-Sync and Fast Sync are unrelated technologies. So no.

 

From what I can find ULMB is a hardware solution proprietary to Nvidia's G-Sync monitors that does backlight strobing

 

So I would assume enabling it only works if the monitor is compatible.

 

The effect should be similar to BFI, though the way it works is different.

hi

1.some monitor has two refresh rate one is 175hz for dp input and the other a 120hz for cdmi input.

How could 120hz round up to 175hz to prevent stuttering if output fps not match the refresh cycle of the monitor?

 

2.if a 60hz refresh rate monitor can support 24,25,30,50,60hz refresh rate input ,I could choose these refresh rate from Nvidia control panel.

The question is how could these kind of refresh rate round up to 60hz,they all can't multiple to 60hz.

Is this some kind of 3:2 pull down stuff?

 

3.i heard that 120hz bfi have better motion clarity than regular 120fps on 120hz display.

Does 120hz bfi option mean that gpu output 120fps all the time to a 120hz display ?

Someone said only 240hz display panel have a headroom to add a black frame with 120fps signal cause 120x2 =240.

Is that true?

 

4.i connect a pc via av receiver output to tv and found out the fps performance is not stable and reduce seriously when compared pc directly to tv.

The fps can stay 120fps all the time if pc directly to tv.

Is this normal?

 

thank you