Can i run 1440P 144hz/120hz on Series X with HDMI 2.0?

for 120hz you need i think hdmi2.1.

besides connecting the s at 120hz is not going to magically let it run at 120fps, you will be lucky to get 40fps on most games. kills my eyes running so slow.

HDMI 2.1 is only needed if you plan to game at 4K for 120hz , on a 4K 144hz monitor, However there's no gaming monitors available at the moment, that yet has HDMI 2.1, the first HDMI 2.1 monitors that are likely to come in are around the same time as the
Series X (Q4) launch or early 2021 (Q1),

1080p and some 1440p monitors can do 120hz over HDMI 1.4 if it's supported, but best ideally is HDMI 2.0 for 1440p for 120hz,

HDMI 2.0 can do 1080p / 1440p at 120hz and 4K at 60hz,

HDMI 2.1 can do 1080p / 1440p / 4K at 120hz.

For the Xbox Series X, it best to get a 4K TV or monitor that supports 120hz and has HDMI 2.1, to get the full potential out of the Series X.

CAn i run xbox series x on 1440P 165mhz monito with HDMI 2.0? I will be able to use 144hz/120hz on 1440P?

Somebody said this to me here:'in bandwidth theory yes, in reality most likely not. 1440p @ 120fps, gives your around 3,3 Gbps pr. channel in 10bit, and should land but the XsX will not output it if it does not detect
HDMI 2.1."

I don't have enough info to confirm if the Series X will be able to run 144hz on a monitor such as the one you have purchased but feel fairly confident that 120hz will be possible since it will be using HDMI 2.1

From what i've read 'HDMI to displayport' adapters are usually limited to 60hz at this point in time as most displays are using HDMI 2.0 so it wouldn't really be worth bothering with as you would still be running 60hz at 1440p as the Xbox One X uses
HDMI 2.0 which will only allow 60hz maximum for 4K or 1440p (1080p/120hz yes, but not 1440p/120hz). Even if your monitor uses HDMI 2.1 it still has to connect to HDMI 2.0 on the console so 120hz would not be possible at 1440p.

Since HDMI 2.0 is what current gen uses 60hz is the optimum setting for 4K and all games are
capped at 30-60fps on the console (also due to the fact that most console users will be connecting to TVs and 60hz is pretty much what most HD/4K TVs are capable of). This should change with the Series X which will have HDMI 2.1 (capable of 120hz)
but seems unlikely that 144hz will be possible on the console. I think the best you could expect is to be able to get 4K/120hz with HDMI 2.1 on the Series X although it is said that it will support up to 8K on TVs/Monitors that are capable.

My recommendation would be to get a monitor that's 4K HDR 120hz as this should be able to get the best of current gen (1440/60hz) and Series X (120hz) without paying extra for 144hz which, as stated in my last reply, would only be useful for Gaming PCs and
not consoles.

Hope this info helps you decide which monitor to go with and has helped in any way to make things a little clearer in regards to why the settings may be working the way they are.

Stay safe and Happy Gaming!

XBA

That doesnt answer the question is it going to work for older monitors that are hdmi 2.0 that didn't run at the 1440p 120hz they were supposed to run at on xbox one x i bought a viotek monitor gft27db was supposed to run 1440p 120hz over the hdmi 2.0 but
it doesn't on the one x only runs at 1080p 120hz with freesync on or 1440p 60hz no freesync will series x solve this issue thats what he wants to know i have heard it was a bandwidth issue but with the new console having higher bandwidth i would guess it would
solve the issue but would like to know for sure

Hello!

For 4K TVs, I think 120 hz with 2.0 hdmi is the maximum that the system will request. Now, for 8K TVs, 144hz with hdmi 2.1 it is necessary. So do not worry.

Hdmi 2.0 can only support 4K at 60hz or 1440p ( 2K ) at 120hz, Hdmi 2.1 will allow 4K at 120hz.

I'm also hoping that the console has a Displayport 1.4, for 4K at 120hz to use on 4K 144hz monitors