The Quartz Canyon series will feature the first NUCs that allow users to add high-end GPUs. The systems are advertised as workstation kits due to the inclusion of Xeon E and Core i7 vPro CPUs. Other features include dual Thunderbolt 3 connectors, Wi-Fi 6 interface, Optane and ECC memory support, plus an internal 500 W power supply.
https://www.notebookcheck.net/Intel-plans-to-release-Quartz-Canyon-workstation-NUCs-with-replaceable-GPUs.428866.0.html