Dell PowerEdge XR12

Expansion card installation guidelines
Figure 33. Expansion card slot connectors
1.
IO_Riser3 ( Riser 3 connector) 2. BOSS (M.2) card connector
3. IO_Riser2 ( Riser 2 connector) 4. IO_Riser1 (Riser 1 connector)
The following table describes the expansion card riser configurations:
Configurations
Expansion card
risers
PCIe Slots Controlling
processor
Height Length Slot width
Config0. R1B+R2A+R3A
Rear / Front
Accessed
configurations
3 Processor 1 Low profile Half length x8
2 Full Height Full length x16
4 Full Height Full length x16
Config1. R1B+R2B+R3B
Rear / Front
Accessed
configurations
3 Processor 1 Low profile Half length x8
1, 2 Full Height Full length x8+x8
4, 5 Full Height Full length x8+x8
Config2. R1B+R2B+R3A
Rear / Front
Accessed
configurations
3 Processor 1 Low profile Half length x8
1, 2 Full Height Full length x8+x8
4 Full Height Full length x16
Installing and removing system components 37