Dell EMC PowerEdge R940xa Handbuch Seite 8

13. Route the SAS cable and riser power cables and GPU power cables
(if applicable) through the cable slot on the air shroud.
14. Install the low profile PCIe card (if applicable) on the system board and push it
down until the blue latch locks with the PCIe holder.
15. Route the SAS cable and Slimline cable through the cable holder on the side
of the chassis.
16. Connect the Slimline cable to the system board connector.
17. Connect the SAS cable to the x8 backplane and x24 extended backplane
connectors.
18. Repeat the same steps for Riser 2.
Follow the below instructions for non-GPU sytem:
1. Press and slide the release button to lift the riser cover.
2. Flip the PCIe latch.
3. Remove the PERC card from slot 4 and reseat it on the slot 5.
4. Install the riser module on the system board and push it down in place.
5. Tigten the two thumbscrews at the rear of the chassis to secure the riser
module in place.
This image shows the cable routing for 32 x 4 P Single PERC cable connection:
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