LG UltraGear 47.5" 4K HDR 138 Hz Gaming Monitor - Manual (Page 25)

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Resolution Horizontal Frequency (kHz) Vertical Frequency (Hz) Polarity (H/V) Remarks
3840 x 2160 214.563 94.98 +/- DisplayPort1.4(DSC*) / DisplayPort1.4
3840 x 2160 268.44 120 +/-
Recommended Timing (HDMI)
HDMI2.1(PC) / DisplayPort1.4
3840 x 2160 274.31 119.94 +/-
Recommended Timing (DisplayPort)
DisplayPort1.4(DSC*)
3840 x 2160 318.31 137.98 +/-
HDMI2.1(PC) / DisplayPort1.4(DSC*)
([Overclock]: [On])
If the input timing is used outside of the supported frequency, response speed or image quality may deteriorate.
*DSC: Display Stream Compression.