Source
r/LenovoLegion•
ContainedChimp

Connected dual monitors. Not able to hit 144hz.

Tech Support

Hi, I have a 5800h Legion 5 that I connect to a dual monitor setup via a usb c dock. Both are connected to tge dock via display port. One of the monitors is a 60Hz Dell the other a 144Hz LG Freesync (non nvidia verified) . I cannot get the LG to work @ 144hz, if I select 120hz it works fine. @ 144hz it just displays fuzzy lines as if it were an unsupported mode. I was wondering if there is a maximum combined refresh rate that the usb c can handle? Or some other thing I am missing?

Posted May 19, 2023, 3:21 PM UTC

16
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1
gbroon•

I think it also depends on resolution.

My dock claims 2x4k at 60Hz but it works fine with a 1080p at 60 and a 1440p at 144Hz.

Another thing to consider is the usb cable. When I used the one that came with the dock I had issues but swapping it out with a better quality cable fixed them.

1
ContainedChimpOP•

I tried various resolutions at various refresh rates, Everything worked @ 120 and under and nothing worked @ 144. The docks USB C cable is non removable so cant replace that. Will try a different DP cable. Also plan to get my hands on a USB C -> DP adapter to bypass the dock and rule that out. Don't have one at the moment though.

1
Apprehensive_Win_321•

Is your hdmi cable 2.1?

1
ContainedChimpOP•

Using DP not HDMI.

1
Beneficial-Yoghurt69Legion 5 6 gen | Ryzen 7 5800H | 130W RTX 3070 | 1080p @165Hz•

You are limited by the HUB and its ports. Connect your display directly to the laptop to avoid such bottlenecks.

1