Can't choose 1440p resolution with 120hz refresh rate on my Xbox Series S.

It depends on what resolution your going to play at and the resolution of the tv,

if 4K, you need HDMI 2.1 to get 4K at 120hz refresh rate,

HDMI 2.0 will only allow 4K at 60hz.

if your at 1080p/1440p, HDMI 2.0 will be ok for 120hz refresh rate, however if it is 1080p/1440p i would recommend getting the Xbox Series S as that is aimed at 1080p/1440p.

Hello, I'm Felipe and I'm an independent Community Expert, and I'll do my best to help you.

There are a few reasons why your Xbox Series S might not be displaying a 120Hz refresh rate, even though it's enabled in the settings. Here are a few things you can try to resolve the issue:

Check the HDMI cable: Make sure the HDMI cable you are using to connect your Xbox Series S to the monitor is compatible with the 1440p resolution and supports a 120Hz refresh rate.

Update the firmware of your monitor: Check to see if there is a firmware update available for your monitor. Updating the firmware can sometimes resolve compatibility issues.

Check the video output settings on your Xbox Series S: Go to "Settings" > "Display and sound" > "Video output" and make sure the output resolution is set to 1440p and the refresh rate is set to 120Hz.

Make sure the game supports 120Hz: Some games may not support a refresh rate higher than 60Hz. Check the game's specifications to see if it supports a 120Hz refresh rate.

Restart your Xbox Series S: Sometimes simply restarting the console can resolve display issues.

If none of these steps help, you may need to contact the manufacturer of your monitor for further assistance.

Yes I'm there and the Game is for 2k. So that is not the problem.

My Xbox One X will not accepted the Setting "1440p with 120hz" with my HP X27i Monitor. Do you now that issue ?

With a lot of monitors, the lower the resolution, the higher the refresh rate you can have.

Near as I can tell, that monitor has a native refresh rate at 1440p of 60Hz (that is what it defaults to)...it then uses Variable refresh rate to bump it up higher. As noted above, the EDID fails as the Xbox needs a 120Hz setting to run at 120Hz. The monitor will definitely do 120Hz via HDMI but only on a PC/Laptop it seems.

I can't confirm it but I suspect that the monitor's native RR for 1080p is 120Hz.

This has been an issue for quite a few HP models, both whilst using the One X and also whilst using the newer Series X/S's

I dont think the Xbox One S can do 1440p at 120hz, only 1080p at 120hz. at 1440p you'll only see 60hz.

Below is a little more information that might help.

120Hz is only available for 1080p and 1440p. If you change your resolution to 4K UHD or 720p, the refresh rate
will be set to 60Hz by default. If your console is set for 4K UHD and you change your refresh rate to 120Hz, your resolution will be downgraded to the highest resolution available
for your display.

To take advantage of 120Hz, you'll need an Xbox One X or Xbox One S running the Xbox May 2018 Update. This update is currently limited to a subset of users enrolled in the Xbox Insider Program, ahead of a wider release set for the coming weeks.

Your Xbox One must also be connected to a compatible TV or monitor, which supports refresh rates over 60Hz. High refresh rates must be supported over HDMI 2.0, due to limitations of the Xbox One hardware.

Constraints of HDMI 2.0 also means 120Hz support cannot be used in conjunction with 4K resolution. And bandwidth limitations mean 1440p or 1080p resolution must be used, cutting a few pixels for those extra frames.

But even with the feature, don't expect system-wide improvements. Many Xbox One titles are developed with hardcoded frame-rate limits, set between 30Hz and 60Hz. While some games are developed with uncapped frame rates, expect many games to see no changes.
We recommend researching your favorite titles for details on frame rate settings.

Because of this resolution drop, the feature isn't recommended for people many with 4K displays. With few games offering 120Hz support on the console, the benefits are limited. But for 1440p or 1080p users, there are advantages.

How to enable Xbox One 120Hz support

To get started with high refresh rates on Xbox One, you'll need to enable the feature on your console. After installing the latest update, follow these steps:

1.Navigate to the Settings app on your Xbox One.

2.Choose the Display & sound tab

3.Select the Video output tile.

4.Open the Refresh rate drop-down menu.

5.Choose 120Hz to increase your refresh rate. (Your console should now output a 120Hz signal.)

Not sure if any of these may be useful as the thread is more related to 1440p monitors rather than 4k ones but maybe one of the solutions posted may help:

https://www.reddit.com/r/XboxSeriesS/comments/lq8jtk/xbox_series_s_1440p_120hz/

Yea, thats the one I wrote about, tried everything and console still doesn't let me to choose 1440p with 120Hz.