Dell Precision 7820 Owner's Manual page 48

d graphical processing unit (GPU)
3 To remove the front system fan:
a Unroute the following cables from the card holder [5]:
• SATA 0,1 cable [1]
• SATA 2, 3, 4, 5 cable [2]
• ODD 0, 1 cable [3]
• USB 3.1 cable [4]
NOTE:
end. Pulling the cable wires may loosen them from the connector.
b Unroute the fan cable [1] from the system board.
c Remove the screw [2] that secure the rear system fan to the chassis.
d Lift the fan to release it from the retention slot in the system chassis [3].
48 Removing and installing components
Do not pull the connector by the cable wires. Instead, disconnect the cable by pulling the connector