Make sure that:
The riser cage is aligned with the rear chassis.
The riser board is firmly seated on the system board.
b. Simultaneously push and rotate the half-turn spring latch to 180° (callout 2).
c. Close the spring latch (callout 3).
4. To install the GPU riser cage, do the following:
a. Slide the cage into the slot (callout 1).
b. Install the two screws (callout 2).
Install the Install the serverserver into the rack into the rack