Look into rk3399 boards. They have m.2 add-ons that connect to the PCI-E lane on the board. https://www.pine64.org/rockpro64/ https://www.pine64.org/rockpro64/

Look into rk3399 boards. They have m.2 add-ons that connect to the PCI-E lane on the board. https://www.pine64.org/rockpro64/ https://www.pine64.org/rockpro64/ https://libre.computer/products/boards/roc-rk3399-pc/ https://libre.computer/products/boards/roc-rk3399-pc/