How to switch USB-C to DP output from HD Graphics to GPU (Notebook: Dell Inspiron 7577)

[eliasweber1998]

I just bought a new Dell Inspiron 7577 Gaming Laptop and want to use it with an external 144hz Monitor by Acer manly for playing Games.
Therfore I bought a usb-c(with Thunderbold 3) to Displayport wire to get the full 144 hz. But somehow if I start Overwatch my dedicated GPU (GTX 1060 MaxQ) has a usage of just up to 50% of its power while the integrated Intel Hd GPU also uses 50%. This leads to much less Fps then if I would just use the 1060 at full Power. After I disabled Intel HD Graphics I got much more GPU usage out of my 1060 but sadly my USB- C port wont function and I just can see the 50% more FPS at my notebook Display at 60hz. My Laptop also has a HDMI 2.0 which would still function and is seemingly directly connected to the GPU but my monitor has no HDMI 2.0. Im despratly searching for a solution of this problem but I just cant find a way to disable HD Graphics while still be able to use the USB - C port.
Is there some driver available to connect the 1060 to this port or is it a Hardware based Problem? Im also wondering if its possible to cut the HD Graphics usage to a minimum to get more out of my GPU.
I would be super gratefull if someone could help me witch this because Im just clueless.

 

[hang-the-9]

Did you contact Dell support to check what video options you have on the USB C port? Seems like if disabling Intel video disables the USB C port video, that port is fed by the Intel onboard video.

 

[kurzweilkurzweil]

Also, before you buy a new monitor, the Dell Inspiron 7577 laptop does NOT suport HDMI 2.0 4k @ 60hz. I connected my 4k HDMI 2.0 monitor and it only worked at 30hz (like HDMI 1.4). Got in touch with Dell and they tested and confirmed it.

 

[esababa]

Have you ever found a solution to this? I'm having the exact same problem.