IBM CS821 Service Manual page 55

Figure 43. Inserting an adapter into position 4 or 5 of the riser
c. If the riser contains a GPU, replace the power cable (A) into the system backplane as shown in
Figure 44.
Figure 44. Plugging the GPU power cable
d. Place the PCIe adapter riser and the cards it contains into the system backplane as shown in
Figure 45 on page 40.
1) Ensure that the PCIe holder release pins (B) are retracted, so the arrows point into the system.
2) Use the alignment pins (A) and slots to help you properly insert the riser cards and replace the
cover
3) Reset the retaining pins to secure the PCIe cage.
Removing and replacing parts
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