You can install it even to a USB 2.0 port.Like Cat6, this beta has lost the ability to install directly on an SSD mounted on a Sonnet PCIe card in Slot 2 (x16) of a MP 3,1. The workaround is to move the SSD to a regular SATA slot for the install, it will boot from PCIe after moving back to the PCIe card.
This could be a problem when wanting to install on a HighPoint PCIe card mounting four NVMe M.2 blades, which I occasionally do.
The Display port problem is still apparent too.