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Display Port Mini refresh rate issue

Tags:
  • External Monitor
  • Laptops
  • Graphics
  • Asus
  • Port
  • Displays
Last response: in Graphics Cards
June 23, 2014 10:41:06 AM

I just got a a new laptop ASUS 15.6'' N550JK-CN054D and got an external monitor for it as well ASUS Gaming VG278HE 27 inch. I was planning to make use of the high refresh rate on the monitor but I am only getting 60 Hz in Windows 8.1.

Connection made using the Display Port Mini from the laptop and the DVI in the monitor with an adapter between them. (Hama mini DisplayPort - DVI - HM53248)

From what I understood, even from some of the threads here, both the display port and the DVI offer 120Hz and only HDMI is limited to 60Hz (which I'm not using).

It shows the monitor as Generic PnP Monitor.

What am I missing?

More about : display port mini refresh rate issue

a b D Laptop
a b Ĉ ASUS
June 23, 2014 10:46:50 AM

Displayport can support full 120Hz signals and 3D @ 60Hz

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a b D Laptop
a c 122 Ĉ ASUS
June 23, 2014 11:01:58 AM

Is your adapter Active (powered) and limited to 60Hz?
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Related resources
June 23, 2014 11:04:34 AM

iceclock said:
Displayport can support full 120Hz signals and 3D @ 60Hz



That's what I read about it as well. Why then does Windows only show me 59 and 60 Hz?

Again I mention that I am adapting from display port mini to DVI. Am not sure if it should be an issue provided that both separate connectors support 120 Hz.

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June 23, 2014 11:06:54 AM

photonboy said:
Is your adapter Active (powered) and limited to 60Hz?


This is the adaptor Hama mini DisplayPort - DVI - HM53248.


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Best solution

a b D Laptop
a c 122 Ĉ ASUS
June 23, 2014 2:07:24 PM

*I believe you have a PASSIVE adapter. I read that passive DP->DVI adapters do not support Dual-Link DVI properly.

You probably need dual-link DVI to support the increased bandwidth that 120/144Hz requires. An active adapter would work but I'm not sure it's worth the cost.

I don't see any point going beyond 60Hz (60FPS) anyway since most games wouldn't go beyond that on your laptop without dropping the visual quality.
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June 24, 2014 1:47:40 AM

photonboy said:
*I believe you have a PASSIVE adapter. I read that passive DP->DVI adapters do not support Dual-Link DVI properly.

You probably need dual-link DVI to support the increased bandwidth that 120/144Hz requires. An active adapter would work but I'm not sure it's worth the cost.

I don't see any point going beyond 60Hz (60FPS) anyway since most games wouldn't go beyond that on your laptop without dropping the visual quality.


I will try to get an active version. If that still does not work, I will simply replace my monitor with one that has DP, as I should have from the start.

Many thanks.

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