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October 25, 2026 at 8:08 am #126381

Zoe Young
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Real talk on the bandwidth math here, because most marketing specs conflate raw and usable throughput. UHBR20 on DisplayPort 2.1 gives you 25.9 Gbps per lane times 4 lanes = 103.6 Gbps raw, but once you subtract the encoding overhead you’re looking at roughly 79 Gbps of actual payload. HDMI 2.1 caps at 48 Gbps raw with around 42.6 Gbps usable. So DP 2.1 isn’t just incrementally better—it’s nearly double the real bandwidth, which matters because it lets you push 4K at 240Hz or 1440p at extreme refresh rates without ever needing DSC. HDMI 2.1 hits its ceiling fast, which is why you’ll see 4K 120Hz+ demand DSC on HDMI but not on DP.

On DSC specifically, from a competitive gaming standpoint: it’s visually lossless when implemented correctly,

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