Dell EMC PowerEdge R7525 Installation And Service Manual page 112

NOTE: The numbers on the image do not depict the exact steps. The numbers are for representation of sequence.
Figure 82. Removing the expansion card riser (Riser 1)
2. For Riser 2, press the blue button on the riser, and holding the touch points lift the expansion card riser from the riser
connector on the system board.
Figure 83. Removing the expansion card riser (Riser 2)
3. For Riser 3, loosen the captive screw, and then press the blue release tab and holding the edges lift the expansion card riser
from the riser connector on the system board.
112 Installing and removing system components