Dell PowerEdge C8220X Hardware Owner's Manual page 244

Remove the four screws securing the mounting brackets to the front
g
GPGPU card. See Figure 3-71.
Lift the mounting brackets from the GPGPU card. See Figure 3-71.
h
Figure 3-71. Removing and Installing the Front NVIDIA Tesla K20 GPGPU Card
1
1 M2.5 screws (2)
3 NVIDIA Tesla K20 GPGPU card
5 back mounting bracket
244
Installing System Components
3
2
2 front mounting bracket
4 M3 screws (2)
4
5