Although 3840 × 2160 is both a 4K resolution and a 2160p resolution, these terms cannot always be used interchangeably since not all 4K resolutions are 2160 pixels tall, and not all 2160p resolutions …

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In this guide, we explore what 4K means, the difference between 4K resolution formats and how they compare, and whether it’s worth the investment for your setup.