Agilex™ 3 FPGA and SoC C-Series Development Kits User Guide
A.6.2. Optional Mode—As a PCIe* Add-in Card in PCIe* Host System
This mode is optional and requires the user to install the optional Altera PCIe* 3.0 x1 gold finger daughter card to convert the development board into a PCIe* add-in card. Once the PCIe* gold finger daughter card is installed, plug the PCIe* add-in card into an available PCIe* card slot in your host system and secure the card to the chassis by screwing the card's I/O bracket to the host system with the supplied hardware included in your Altera PCIe* 3.0 x1 daughter card.
When operating as a PCIe* add-in card, you must still provide power to J8 with a USB-PD compliant power adapter plugged into J8. Slide the switch SW3 to the ON position to power on the board. The board cannot be powered on without a USB-PD power adapter plugged into J8 as the board does not receive any power from the host's PCIe* card slot through the PCIe* gold finger daughter card.