Dell PowerEdge C8000 - Manual (Page 263)

Installing System Components 263
f Press down the cable-locking tabs and disconnect the power cables
from the Xeon Phi card. See Figure 3-85.
Figure 3-85. Removing and Installing the Back Xeon Phi 5110P/7120P Card Cables
g Remove the eight screws securing the mounting brackets to the back
Xeon Phi card. See Figure 3-86.
h Remove the mounting brackets from the card. See Figure 3-86.
1, 4 cable-locking tab 2, 3 power cable
2
3
1
4