Setting up Dell S2417DG monitor
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Install nVidia drivers and make sure you have NVIDIA Control Panel. Choose correct resolution (2560x1440) and desired refresh rate
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Factory reset the settings on your monitor (open OSD, then Others > Factory Reset) S2417DG ICC from here http://www.tftcentral.co.uk/articles/icc_profiles.htm
- Download and open. You won't see anything happen. Then go here http://www.tftcentral.co.uk/articles/icc_profiles.htm#install and read the Windows 7 section starting at the step saying 'Tick the "use my settings for this device" check box'
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You will have to every time you boot until you script it (I haven't yet), but this makes the most difference: https://www.reddit.com/r/Monitors/comments/6cwnrb/fixing_color_banding_on_the_dell_s2417dg_s2716dg/
- The top reply also has some good research but I didn't find the numbers very useful. He/she's right about >0.67 gamma.