I am using this for 3440 x 1440 120Hz Ultra Wide Screen and it works exactly as expected on Windows 10, macOS and Linux. I am using cables designed for DisplayPort 1.4. The only downside I have is that it requires a USB power cable, which seems excessive to me. Note that switching is essentially the physical movement of a cable between devices. That's exactly what I wanted, just to point out that this isn't a KVM switch.
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