ALIENWARE AW2518HF not showing 240hz but only 144hz

[v.mydlar99]

ALIENWARE AW2518HF not showing 240hz but only 144hz with DP 1.2 monitor and my GTX 770 supports it.

 

[Glenwing]

Try setting a custom resolution.

Section 6.3.1 here:
http://www.tomshardware.co.uk/forum/id-3675170/connect-120-display-construction.html

 

[v.mydlar99]

When I successfully create my custom resolution i dont have it in resolutions to apply.

 

[dallasjhnsn0]

Same problem here with the same hardware. I know GTX 700 series cards don't support 1440p > 120Hz because of their pixel clock, but 1080p @ 240Hz is still within their pixel clock limitations. I made sure to install dell's drivers as well, to no success. I assume this is some weird limitation of the 770...

 

[Glenwing]

Can you download the custom resolution utility, find the 1080p 240 Hz listing, click edit, and show me the settings?

It might be inside the CEA extension block, like this:

EDIT: According to the manual, the 1920 × 1080 @ 240 Hz mode runs at a 594 MHz pixel clock, which is beyond the 540 MHz limit of the GTX 770.

 

[lucasdiniz123]

I have a similar issue. I am using a dp to mini dp, not sure which version and my gtx is the 880m. It only goes up to 144hz, although it shows the option 240hz, but when I try to use the 240hz the screen freeze as this image: https://imgur.com/a/Nzz60X0 . Then the screen come back to the normal as 144 hz. I don't know what is happening, maybe my cable doesn't have a good quality.

 

[Glenwing]

I have a similar issue. I am using a dp to mini dp, not sure which version and my gtx is the 880m. It only goes up to 144hz, although it shows the option 240hz, but when I try to use the 240hz the screen freeze as this image: https://imgur.com/a/Nzz60X0 . Then the screen come back to the normal as 144 hz. I don't know what is happening, maybe my cable doesn't have a good quality.

GTX 880M is a Kepler graphics chip, it has a hardware limit of 540 Mpx/s. This means 1080p 240 Hz is outside the limit. You may be able to set a custom resolution for 200 Hz, but you won't be able to get much higher than that.

 

[lucasdiniz123]

I have a similar issue. I am using a dp to mini dp, not sure which version and my gtx is the 880m. It only goes up to 144hz, although it shows the option 240hz, but when I try to use the 240hz the screen freeze as this image: https://imgur.com/a/Nzz60X0 . Then the screen come back to the normal as 144 hz. I don't know what is happening, maybe my cable doesn't have a good quality.

GTX 880M is a Kepler graphics chip, it has a hardware limit of 540 Mpx/s. This means 1080p 240 Hz is outside the limit. You may be able to set a custom resolution for 200 Hz, but you won't be able to get much higher than that.

Thanks for the help! I will try to buy a new pc around 2020 hahaha