Freesync adds a decent amount of smoothness, but doesn't work with HDR on AMD. You have to choose either one or the other. Technologies are not yet ready for the convenient use of 4k HDR, you have to climb a lot through the settings in managing the video card, video player, Windows. Few games support 4K HDR. HDMI 2.0 does not support 4K HDR 60Hz 4:4:4. Or buy a DP cable, or choose 4:2:2 or set to 50Hz or no HDR.
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