4k TV @ native 120hz

[UniteCenero]

Hey all!

I have a question about getting my 4k TV to run on my pc at it's native 120hz.

I currently am upgrading my graphics card from a GTX 1060 to an RTX 2080, as my 1060 simply can't handle the strain of 4k and dips at 1440p.

Now currently, I cannot get my TV to run higher than 60hz, even though it boasts a native hz rate of 120.

 

Why is that?

Is my graphics card holding me back?

Do I need to change Windows 10 system settings to display at 1440p instead of 4k?

I'm just not sure.

The TV I currently have is the LG 55" SK8000PUA

 

Thanks for any feedback!

[Glenwing]

4 minutes ago, UniteCenero said:

Hey all!

I have a question about getting my 4k TV to run on my pc at it's native 120hz.

I currently am upgrading my graphics card from a GTX 1060 to an RTX 2080, as my 1060 simply can't handle the strain of 4k and dips at 1440p.

Now currently, I cannot get my TV to run higher than 60hz, even though it boasts a native hz rate of 120.

 

Why is that?

Is my graphics card holding me back?

Do I need to change Windows 10 system settings to display at 1440p instead of 4k?

I'm just not sure.

The TV I currently have is the LG 55" SK8000PUA

 

Thanks for any feedback!

If it supports 120 Hz, it will likely only be at 1080p.

[UniteCenero]

Scaling down the resolution does not change the refresh rate.

It changes the desktop resolution but does not change the active signal resolution, which is set at 4k.

[Glenwing]

39 minutes ago, UniteCenero said:

Scaling down the resolution does not change the refresh rate.

It changes the desktop resolution but does not change the active signal resolution, which is set at 4k.

Then you will need to deactivate GPU scaling in the NVIDIA control panel.

 

[TacticalSquid]

Every TV that I've ever looked at specs wise for comparison (HT Salesman) runs into the same issue. Basically it comes down to bandwidth with most newer TVs only (or at the maximum if you're lucky) having support for HDMI 2.0a (Cheaper tvs may only have one port supporting this with other HDMI ports being HDMI 1.4 so 4k30 no HDR) which serves as the bottleneck in terms of performance. As a standard, you can only do 4k60 over HDMI 2.0, with the later "a" revision adding support for HDR. So no matter how much you try, you'll be exceeding the bandwidth supplied by the interface and thus be unable to reach a true input of 4k120. 

 

It sucks, and I don't understand why they don't just include a DP connector on the back of highend TVs, especially Samsung with their nerfed version of Freesync in their TVs and main talking point of lower input lag than the competition this year.

 

Interestingly enough, not all 120hz tvs even support 1080@120, even though there aren't any bandwidth limitations there at all and in fact some TVs that originally have supported it have either removed it via updates (Vizio M60 2015) or don't support it very well (Sony 2015-2017 series).

 

Its a toss-up on why that happens or if they ever will. Likely it will take NVIDIA releasing their BFGD TV to force manufacturers to get smart and include the feature, or a jump to 8k so they can release a half-assed attempt like they've generally done with current 4k tvs.