Dell PowerEdge R740xd Installation And Service Manual page 177

Figure 135. Cable routing – 24 x 2.5 inch drive backplane with 12 SAS plus 12 PCIe and adapter PERC
1 backplane
3 backplane power cable A
5 PCIe cable A of PCIe card 1
7 SAS cable
9 PCIe card 1 on riser 3A (slot 8)
11 PCIe card 2 on riser 2A (slot 4)
13 PCIe cable A of PCIe card 3
15 PCIe cable A of PCIe card 2
17 backplane expander
2 backplane signal cable
4 backplane power cable B
6 PCIe cable B of PCIe card 1
8 system board
10 adapter PERC on riser 2A (slot 6)
12 PCIe card 3 on riser 1A (slot 1)
14 PCIe cable B of PCIe card 3
16 PCIe cable B of PCIe card 2
Installing and removing system components 177