Xbox One X -1440p 120hz gaming monitors?

The Xbox One X supports 120hz only at 1440p and 1080p resolutions. It does not support 120hz at 4k. So unless your TV or monitor supports 1440p resolution (many don't), you will only get 1080p when selecting 120hz.

monitor for Xbox Series X at 1440p 120hz. If you have trouble getting 1440p 120hz on the Series X using the provided Microsoft hdmi cable, try switching it with the one that came with the monitor. At first I could not get 120hz using the provided hdmi cable that came with the Xbox, but switched it to the one that came with the monitor and the option for 1440p 120hz finally became selectable.

https://www.bestbuy.com/site/reviews/lenovo-legion-y27q-20-27-ips-led-qhd-freesync-gaming-monitor-hdmi-raven-black/6404024

Looks like.the monitor is picky

As it has issues with ps5 and series x

Odd it requires a hdmi 2.0 rather then a hdmi 2.1 cable

That was a comment by another user also Bestbuy has Lenovo experts in ther

Until you don't proof me this specific monitor (Xiaomi Mi Curved 34) enables 1440p@120hz with Xbox Series X, your comment is meaningless.

Yeah, there are some monitors with 1440p@120hz support for Xbox series s/x, that simply doesn't mean that ANY 1440p+ monitor with 120hz+ (especially 144hz+) can do it. Period.

I've tried everything, that (1440p@120hz) simply doesn't work with that monitor. I've already listed every step I've tried, I'm not gonna write it again.

Please read previous comments before posting the same dried comments...

I would look into your monitor and call DELL not Microsoft. I also have a One X and have never had any problems, as soon as select 120hz it automatically drops me down from 4K to 1440p. You must be misunderstanding something about your monitor as there
must be a defect of some sort or your monitor does not support 1440p at 120hz.

For reference, before responding I booted on both my One X's. One is connected to a Samsung 4K QLED and I had no problem switching from 4k 60 to 1440p 120. My other X is connected via an LG 4K monitor and again when selecting 1440p OR 120hz it automatically
selects 1440p or 120hz without any issues.

It sounds like any monitor that uses non standard Vesa frequencies (144hz as opposed to 120hz) will not be able to effectively run at 120hz with 1440p on xbox one x.