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If you want to be safe, buy an HDMI that supports 8k. Although this TV does not support 8k, it does support 4k@120hz. The 8k HDMI will support both 8k and 4k@120hz formats as well as other features (e.g. eARC, HDR) without issue. They are priced not much higher than lower-grade HDMI's, so no real reason not to go for the safer option.
Sorry, there was a problem. Please try again later.The recommended HDMI cables for use with the LG C9 77 inch Class 4K Smart OLED TV w/ AI ThinQ® (76.7'' Diag), Model # OLED77C9PUB are Ultra High Speed HDMI Cables that are designed to support the new eARC feature in addition to the highest resolution video modes. The Standard HDMI Cable with Ethernet and the High Speed HDMI Cable with Ethernet will also support eARC...^IFV
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