3x BenQ XL2420T problem

[pakaste]

Hi,
I'm having a little problem with my tri-XL2420T setup.
Basically, I can only set two screens to 120Hz, while the third just has a maximum Hz of 60?

 

[tinytomlogan]

I dont think you need to worry about trying to get 3 screens to 120FPS mate

 

[pakaste]

Well, the point is that I'm trying to figure out the reason why this is not possible?

 

[jamesriley94]

Well, the point is that I'm trying to figure out the reason why this is not possible?

What graphics card do you have, and what ports are they plugged in to?

I'd imagine it would be something like HDMI or one of the DVI ports/cables not supporting 120hz at 1080p?

 

[B3rni3]

If I am not mistaken you can only run these monitors at 120hz from the dvi ports. I am not sure about the display port but I am pretty sure the hdmi cannot support 120hz.

 

[NeverBackDown]

HDMI is 60hz only(i think). DisplayPort and DVI can do 120hz.

 

[Etlar]

HDMI 1.3a


The HDMI specification defines the protocols, signals, electrical interfaces and mechanical requirements of the standard. The maximum pixel clock rate for HDMI 1.0 was 165 MHz, which was sufficient to support 1080p and WUXGA (1920×1200) at 60 Hz. HDMI 1.3 increased that to 340 MHz, which allows for higher resolution (such as WQXGA, 2560×1600) across a single digital link. An HDMI connection can either be single-link (type A/C) or dual-link (type "B" and can have a video pixel rate of 25 MHz to 340 MHz (for a single-link connection) or 25 MHz to 680 MHz (for a dual-link connection). Video formats with rates below 25 MHz (e.g., 13.5 MHz for 480i/NTSC) are transmitted using a pixel-repetition scheme.

 

[pakaste]

What graphics card do you have, and what ports are they plugged in to?

I'd imagine it would be something like HDMI or one of the DVI ports/cables not supporting 120hz at 1080p?

My graphics card is GTX 780 and I have 2x DVI-DVI and 1x DP-DVI plugged.

 

[jamesriley94]

My graphics card is GTX 780 and I have 2x DVI-DVI and 1x DP-DVI plugged.

Might help to tell us which the monitor that can only do 60hz is running off...?
I'd assume the DP-DVI, but best to clarify

 

[NeverBackDown]

Display port 1.2 is the fastest connection(by quite a bit) and should be used for 120hz gaming over a HDMI port.

 

[pakaste]

Might help to tell us which the monitor that can only do 60hz is running off...?
I'd assume the DP-DVI, but best to clarify

It can be any of them apparently. I can somehow force 120hz from Windows, but then it just swaps the 60hz cap on some other screen.