Question Alienware M15 stuttering with external 34“ monitor

[Nemeton]

Hi all, I have problems with the laptop of my daughter.
When I plug-in the external monitor via hdmi in the system is awful stuttering.
When unplug the monitor the system is instant fast as hell.
The monitor is a LC Power M34-UWHQ.
I have no problems with the old HP E243 Office Monitor in 1080p.

Things I have tried:

• Updating gpu and any other drivers as well as system updates
• Reduce from 1440p to 1080p
• Switched between 100hz and 60hz
• Switched the HDMI cable
• Reinstalled Alienware command center
• Reset monitor (on monitor itself)
• deactivated igpu
• Reset display settings via CTRL Shift Win B
• tested the monitor with an other laptop - there it is running fast

The laptop is an Alienware M15 R7 with an RTX3070ti and 32GB Ram.
And because of the fact that the monitor is working with other notebooks as well as the Alienware is also working with other monitors there must be something between the Alienware and this specific monitor.

I am running out of ideas how to solve it… I am struggling since 2 fkin weeks.. 😓

Maybe somebody has an idea…

 

[Aeacus]

LC Power M34-UWHQ.

You forgot to mention that this monitor is 2K ultrawide, with 3440x1440p reso.

I have no problems with the old HP E243 Office Monitor in 1080p.

Well, yeah. Far less pixels to render on 1920x1080p reso.

Pixel count wise;
2K ultrawide has 4953600 pixels to render.
1080p has 2073600 pixels to render.

Thats 2.5 times more pixels to render on LG, than on HP monitor. And this is where i think, the diff is.

with an RTX3070ti

Do note that laptop version of GPU is FAR inferior to the desktop version of the same GPU.

RTX 3070 Ti for laptops is equal to RTX 2070 Super for desktops,
comparison: https://gpu.userbenchmark.com/Compa...ptop-vs-Nvidia-RTX-2070S-Super/m1757879vs4048

 

[Nemeton]

Like I have written in my tasks I have reduced the resolution from 1440 to 1080p, especially 1920x1080 on the monitor and this doesn’t solved the problem.
Also the monitor has been working fast before, but from one day to another the pc was stuttering and that’s also the reason why I think there must be any setting or something.

Also my 2070S in my desktops runs faster with an higher resolution, there I have a 32:9 49“ from Samsung.