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Connect thru hdmi, edit the input and name "pc" and you will get 0 lag, if you don't do this you WILL get lag, I already own an LG 4k tv and this is how I solved it.
Sorry, there was a problem. Please try again later.Regrettably, input lag is not an official television specification because it depends on the type of source and the TV settings. It will vary from one game console to the next. The longer it takes for the LG 4K UHD HDR Smart LED TV - 65" Class (64.5" Diag), Model # 65UH6150 to acquire the source image, process it then display it are factors that cause input lag. Using an HDMI cable minimizes the acquisition. If your gaming console uses analog connections, you will experience more input lag because the TV takes more time to convert the analog signal to a digital one before it can be displayed. The conversion takes time because of video processing which has to interpolate the picture to match the television's refresh rate and scale it from the gaming console's resolution to UHD. The Gaming mode disables most of the picture options and time-consuming processing in the TV which helps with input lag...^IFV
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