Problem Gaming 4K at 120Hz Razer Blade Pro 17 - 4K Touch 120Hz - GeForce RTX 2080 Super Max-Q - on LG TV


Having issues getting 4K 120Hz while gaming on LG 55QNED80UQA with my Razer Blade Pro 17 - 4K Touch 120Hz - GeForce RTX 2080 Super Max-Q. This 55” TV should support 4K at 120Hz and support both G-Sync and Free Sync:

The laptop’s HDMI is 2.0b so in order to get 4K at 120Hz I tried an Amazon USB-C to HDMI 2.1 cable ( and also Best Buy’s RocketFish HDMI 2.1 Cable with j5create USB-C to HDMI 2.1 8K Adapter. I connected both cables to the Thunderbolt 3 port on the right side of the laptop.

In made sure in the TV’s menu I turned on Gaming mode and FreeSync VRR.

With the Amazon Cable I was able to get the Setup G-Sync option in the NVIDIA Control Panel but in 4K the picture was turning off then one all the time about once a second, even with just the desktop.

With the cable and adapter I got at Best Buy I was not given the option to setup G-Sync in the NVIDIA Control Panel. 4K at 120 Hz worked for the desktop, but as soon as I launched a game, the image on the TV was just static.

Any suggestions on how I can get 4K 120Hz gaming on my LG TV?

I’m sure this laptop is more than capable to support 4K 120HZ in gaming.

Thank you.

My quick searching says maybe: Ultimate PC Gaming: What Does It Take to Play at 4K and 144Hz? | PCMag

But note that is for Desktop GPUs… Laptop GPUs are usually a fraction…this is not the best website but the mobile is just half the capability of the desktop gpu: UserBenchmark: Nvidia RTX 2080 (Mobile Max-Q) vs 2080S (Super)

I can play on the Laptop’s 4K monitor in 120Hz no problem.

I’d like the experience to be more immersive on a 55" TV rather than 17" laptop monitor.

Have you checked that you are using the right port on the TV? Often only one of the input ports will have support.

It sounds like a TV issue rather than with your laptop, but you are right that could be a port/cable issue too.

I was using the gaming HDMI 2.1 EARC port on the TV and enabled gaming mode on the TV and also variable refresh rate.

Latest GPU drivers? In Nvidia control panel is it set to broadcast only to the TV? Sometimes I have found a classic reboot (with everything connected) can help too

Googling, try a usb-c to dp1.4 cable. Ideally you would have a thunderbolt > Displayport cable. Thunderbolt and USB-C are not the same.

It’s a bit of a bodge tbh but it might work. If the port doesn’t fully support it, it won’t work whatever you try as it is a conversion between formats.

You won’t get 120 FPS. You probably get less than 60FPS directly on your laptop in 4k. Zwift is crazy inefficient and will be maxing out your CPU let alone your GPU.

Nvidia Experience drivers are all up to date.
Zwift on Laptop monitor does 4K @ 120Hz with no problem.

Thunderbolt 3 is connected directly to GPU. Whereas the other USB-C is not.
TV doesn’t have Display Ports, only HDMI 2.1

try displayport with an appropiate adapter if possible edit: sorry, did not read the last post. generally displayport will give you less headaches in the long run if you can run it, but i think suggesting you replace the tv is probably overkill as there may be a workaround i’m not aware of

4k @ 120hz and 4k @ 120FPS are not the same thing.

From what I know, admittedly, sometimes not much…but the ARC hdmi connection is for Audio…allows your tv remote to control volume to the AVR. I do not think it has much to do with video. As @gloscherrybomb suggested, I would try another HDMI port.

Yesterday I hooked up the HDMI cable and reduced the resolution to 1440P (2560×1440). Got 100+ FPS.
Might be the compromise I need to make.


HDMI 3 is definitely 4K 120Hz


While running laptop only, did you ever measure the FPS? Or upload to

Yeah, ran it last night at 4K 120Hz with GeForce overlay, was getting around 70 FPS.

So it’s working now?

I gave up on 4K (3840 x 2160) at 120 Hz via Thunderbolt 3 port using USB-C to HDMI cable or adapter.
I’m just using the. HDMI port for 2560×1440 resolution in 120Hz.
I could also use the HDMI for 4K @ 60Hz, but I prefer the faster refresh rate.

Would be nice if it was easier to connect a very capable laptop to the gaming TV.
Very difficult to find a cable that’s long enough that has all the required specs.

HDMI 4 support 4K 120 Hz.

I tried HDMI 4 was the same.