Two ports at once have been used for Samsung’s 5120x1440 240hz monitors. Each port refreshes half of the screen and there are two scanlines going from left to right. Using the calc here you might be able to use two DP2.1 UHBR80 cables with DSC and nonstandard timings to run 4k 1000hz 10bit.

There are a few router with 10gbps ports on the market, like asus gt-be98 pro. They don’t actually run 10gbps since the processors can’t keep up, but they do run well above 2.5gbps.

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