HP ProLiant DL360 Gen9 User Manual page 74

Install the full height PCIe x16 riser cage latch.
8.
Align the PCIe x16 riser cage with the corresponding connector on the system board, and then press
9.
down on the riser cage.
An HPE DL360 Gen9 Smart Array P440ar Controller for 2 GPU configurations (726740-B21) is
required when configuring the server with dual GPU cards. If a GPU is installed in the full height PCIe
riser cage option, connect the GPU cable to the riser cage connector and the installed GPU.
CAUTION: To prevent improper cooling and thermal damage, do not operate the server
unless all PCI slots have either an expansion slot cover or an expansion board installed.
Hardware options installation 74