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Table 2. PCIe generation 3 slots in the system
Slot
Adapter size
PCIe3, x16
Low-profile
PCIe3, x8
Low-profile
1
The slot is not available to install other adapters in the expanded function system backplane.
Two PCIe generation 3 (PCIe3) switches in the system backplane provide PCIe3 busses from the system
processor modules that provide connectivity to the following features:
v PCIe slots
v Embedded PCIe local area network (LAN) controller
v PCIe3 internal SAS controller
v PCIe3 USB controller
The two PCIe3 switches follow:
v PCIe3 Switch 1 that provides PCIe buses from Processor Module 1, Chip-0.
v PCIe3 Switch 2 that provides PCIe buses from Processor Module 1, Chip-1.
Table 3 lists the features provided by the PCIe3 switches.
Table 3. PCIe generation 3 switches in the system.
Features provided
Lanes and ports
Lane and polarity reversal
All ports support concurrent maintenance through
I2C bus
End-to-end cyclic redundancy check (CRC) and
Poison bit error checking
Data path parity
Memory error correction
Advanced error reporting
Aggregate full duplex bandwidth
Designate any port as the Upstream port
27x27 mm, 676-pin FCBGA package
Power consumption
2
Power Systems: PCIe adapter placement for the 5148-21L, 5148-22L, 8247-21L, 8247-22L, 8284-21A, or 8284-22A
8247-21L and
8247-22L and
5148-21L
5148-22L
2 slots
4 slots
®
(P1-C6 and
(P1-C3
, P1-C5,
P1-C7)
P1-C6, and
P1-C7)
3 slots
4 slots
1
(P1-C9
,
(P1-C2, P1-C9
P1-C11, and
P1-C11, and
P1-C12)
P1-C12)
PCIe3 Switch 1
32-lane, 8-ports PCIe Gen3
With integrated 8.0 gigatransfers per second (GTps)
Serializer/Deserializer (SerDes) speed negotiation, for each
port
Supported
Yes
Supported
Supported
Supported
Supported
512 GT/s
Yes
Yes
v Nominal: 6 watts
v Maximum: 12 watts
Slot availability in
8284-21A
8284-22A
1 processor
1 processor
2 slots
2 slots
(P1-C6 and
(P1-C6 and
P1-C7)
P1-C7)
4 slots
3 slots
1
1
,
(P1-C9
,
(P1-C9
P1-C10,
P1-C11, and
P1-C11, and
P1-C12)
P1-C12)
PCIe3 Switch 2
48-lane, 12-ports PCIe Gen3
Supported
Yes
Supported
Supported
Supported
Supported
768 GT/s
Yes
Yes
v Nominal: 8 watts
v Maximum: 12 watts
8284-22A
2 processors
4 slots
(P1-C3, P1-C5,
P1-C6, and
P1-C7)
4 slots
1
1
,
(P1-C2, P1-C9
,
P1-C11, and
P1-C12)
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