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Nvidia Control Panel HDR Setting

FBPerformance
By FBPerformance
in Graphics Cards
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I just got a new monitor - Dell U2718Q which does 4K and supposedly HDR. I attempted to go into the NVIDIA control panel and change the settings to RGB/12bit/Full Range, however when I click apply the monitor goes black, then comes back and the options are back at the default values which are YCbCr422/10bit/Limited range. I am doing this over a known capable HDMI 2.2 cable. Also I have an Alienware 15 w/1070 that I am using as the system. Any ideas?

Alienware 15

-i7 7700hq

16gb 

256 960 Evo

1tb HDD

GTX1070

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https://linustechtips.com/topic/914045-nvidia-control-panel-hdr-setting/
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UPDATE . . . I uninstalled the display drivers completely, and reinstalled them (391.35), still not able to get it to switch to RGB/12bit/Full Range. I have setup a post on Dell's forum and have yet to hear anything as well. Anyone run across this before?

Alienware 15

-i7 7700hq

16gb 

256 960 Evo

1tb HDD

GTX1070

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