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The port (#5) on the Vizio P65 is for 4K (UHD) content at 60 Hz. It does not provide any of the upscaling functionality that helps with better display of 1080 HD content; use port #1 for your cable box. Your cable box most likely outputs 1080i which is HD, not UHD. Current sources for true 4K are via the USB port (computer downloads) and streaming from some providers such as Amazon Instant Video and Netflix.
Sorry, there was a problem. Please try again later.The 4K port is for a PS4 or a 4K DVD player when it comes out & when Dish or whatever Sat. Company you have comes out with there 4K witch is later this year they say...
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