We need to put out more documentation around the host side of it, but it is USB4, supporting DisplayPort Alt Mode on all four ports. For Thunderbolt, we can't

We need to put out more documentation around the host side of it, but it is USB4, supporting DisplayPort Alt Mode on all four ports. For Thunderbolt, we can't state anything until we can complete certifications. For the device side, we've published open source reference designs to let folks develop their own cards: https://github.com/FrameworkComputer/expansioncards https://github.com/FrameworkComputer/expansioncards