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PCIe subsystem
The section below contains information about the PCIe Risers and PCIe slot power.
PCIe risers
The R940xa must have Riser 1 to be installed. The list below are the riser offerings for R940xa:
Table 15. Expansion card riser specifications
PCIe slot
Riser
Processor connection
Height
Length
Slot width
1
X8 PCIe Riser 1
CPU 4
Full Height
Full Length
x8
2
X16 PCIe Riser 1
CPU 4
Full Height
Half Length
x16
2
X8 PCIe Riser 1
CPU 4
Full Height
Full Length
x8
3
X8 PCIe Riser 1
CPU 1
Full Height
Full Length
x8
4
X16 PCIe Riser 1
CPU 1
Full Height
Half Length
x16
4
X8 PCIe Riser 1
CPU 1
Full Height
Full Length
x8
5
X16 PCIe Riser 1
CPU 4
Full Height
Half Length
x8
6
X16 PCIe Riser 1
CPU 1
Low Profile
Half Length
x16
7
X16 PCIe Riser 2
CPU 2
Low Profile
Half Length
x16
7
X16 PCIe Riser 2
CPU 2
Low Profile
Half Length
x16
8
X8 PCIe Riser 2
CPU 3
Full Height
Full Length
x8
9
X16 PCIe Riser 2
CPU 3
Full Height
Half Length
x16
9
X8 PCIe Riser 2
CPU 3
Full Height
Full Length
x8
10
X8 PCIe Riser 2
CPU 2
Full Height
Half Length
x8
11
X16 PCIe Riser 2
CPU 2
Full Height
Half Length
x16
11
X8 PCIe Riser 2
CPU 2
Full Height
Full Length
x8
12
X16 PCIe Riser 2
CPU 3
Full Height
Half Length
x8
12
X8 PCIe Riser 2
CPU 3
Full Height
Full Length
x8
PCIe slot power
Each Slot is designed to allow 75W for each card edge connector. In addition to this there are a total of two auxiliary PCIe power
connectors available-one each for Riser1 and Riser 2. Riser 1C/2C and 1D/2D auxiliary PCIe power connectors are populated on the
riser itself, whereas Riser 1A/2A/1B/2B connect to auxiliary power connectors on the system board.
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