Technically you could run USB 2.0 data simultaneously if you found an adapter that would do that, which is possible because that runs over separate pins in a USB-C connector dedicated to that purpose - but I haven't seen an adapter like that. But then of course you lose the multi-purpose adapter capabilities. ![]() The only way to run 4K 60 Hz from that system over USB-C is to use a setup that would allocate all four high speed lanes to video, as a USB-C to HDMI 2.0 cable/adapter plugged directly into your system would do. That cuts display bandwidth in half, and on a system that only supports DisplayPort 1.2/HBR2 over USB-C rather than DisplayPort 1.3/HBR3 over USB-C, half bandwidth isn't enough to run 4K 60 Hz, which is why you only have 4K 30 Hz. Supporting USB 3.x requires two of the four high speed lanes in a USB-C connector, which means you only have two lanes rather than four for video. The reason is that the adapter is setting up the USB-C link to support carrying video and USB 3.x data simultaneously. With an XPS 15 9560, you're only going to get 4K 30 Hz from multi-purpose adapters like that.
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