Lenovo System x3850 X6 Quick Start Manual page 13

The I/O layout of the x3950 X6 server is essentially the same as the x3850 X6, just with twice
the components.
The I/O subsystem is directly attached to a processor.
Socket 1 (the CPU book closest to the Storage Book) is responsible for the ML2 slot, Slot
9 and Slot 12.
Socket 2 is responsible for Slots 7- 8 and Slot 11.
Both sockets 1 and 2 drive their respective I/O through the Primary I/O Book.
Socket 3 is attached to Slots 4-6, and Socket 4 is connected to slots 1-3.
Slots 1-6 are configurable in how they present I/O. In the case of the FH/HL I/O Book, this
is presented as 1x16 slot and two x8 slots. For the FH/FL I/O Book, this configuration is
presented as 2x16 slots and 1x8 slot.
You can opt for any combination of the two possible I/O Books.
In an eight-socket configuration, Socket 1 is in the bottom node.
Table 6 shows the processor and PCIe slot association.
Table 6 Processor and PCIe slot association
Processor
CPU 0 (Compute Book 1)
CPU 1 (Compute Book 2)
CPU 2 (Compute Book 3)
CPU 3 (Compute Book 4)
Slot 10 configuration: Slot 10 is intended for Mezzanine LOM 2 (ML2) network adapters
only and cannot be used for regular PCIe adapters.
Figure 9 shows the numbering of the PCIe slots on the x3850 X6.
Bay 1 Bay 2
Slots: 1 2 3 4 5 6
Figure 9 x3850 X6 PCIe slot numbering
PCIe slot association
9, 10 (Primary I/O Book) and Storage Book Slot 12
7, 8 (Primary I/O Book) and Storage Book Slot 11
4, 5, and 6 (I/O Book 2)
1, 2, and 3 (I/O Book 1)
7 8 9 10 11
Lenovo System x3850 X6 and x3950 X6 Quick Start Guide
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