刷新率
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显示器每秒更新图像的次数，以Hz为单位测量，直接影响线缆带宽需求。
更高的刷新率（120Hz、144Hz、240Hz）可为游戏和视频提供更流畅的动态效果。刷新率每增加一倍，所需带宽也会翻倍：4K@60Hz需要约18 Gbps，4K@120Hz需要约36 Gbps。这就是为什么4K@120Hz需要HDMI 2.1或支持DSC的DisplayPort 1.4。大多数消费者只需要60Hz；游戏玩家则受益于120Hz以上。