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

eliasweber1998

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Nov 9, 2017
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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.
 

kurzweilkurzweil

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Nov 14, 2017
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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.
 

kurzweilkurzweil

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Nov 14, 2017
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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.
 
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