As a result, the early 4K displays on the market only accepted 4K 60 Hz on their DisplayPort input and were limited to 1080p or maybe 1440p 60 Hz over HDMI (or 4K 24 Hz over HDMI, which might be useful if you're hooking up an Ultra Blu-ray player). ![]() DisplayPort has supported enough bandwidth to run 4K 60 Hz for years, actually since before 4K displays even existed, but HDMI has only recently caught up. ![]() And later on, once HDMI was updated to support 2560x1440 60 Hz, newer displays implemented the newer HDMI standard and therefore could accept that resolution on both DisplayPort and HDMI (although even then, some manufacturers might have kept the old HDMI chipsets to cut costs.) For example, if you wanted to connect your PC via DisplayPort and a game console via HDMI, and the game console only supported 1080p anyway, then this limitation didn't matter. Instead, they simply added an HDMI input that only supported 1080p 60 Hz. So for example, once DisplayPort offered enough bandwidth to support 2560x1440 60 Hz, display manufacturers didn't want to wait until HDMI caught up before releasing their 2560x1440 displays. DisplayPort has always supported higher bandwidth than HDMI at any given time, or has at least implemented the higher bandwidth support first. If you want a bit more technical background/history, here's why this happens.
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