Lenovo Flex System x240 Instruction Manual page 29

The PCIe Expansion Node is attached to the x240 as shown in the following figure.
Figure 10. PCIe Expansion Node
The ordering information for the PCIe Expansion Node is shown in the following table.
Table 17. Ordering part number and feature code
Part number Feature code
81Y8983 A1BV
The PCIe Expansion Node has the following features:
Support for up to four standard PCIe 2.0 adapters:

Two PCIe 2.0 x16 slots that support full-length, full-height adapters

Two PCIe 2.0 x8 slots that support half-length, low-profile adapters

Support for PCIe 3.0 adapters by operating them in PCIe 2.0 mode

Support for one full-length, full-height double-wide adapter (consuming the space of the two

full-length, full-height adapter slots)
Support for PCIe cards with higher power requirements -- a single adapter card (up to 225W), or to

two adapters (up to 150W each)
Two Flex System I/O expansion connectors for to further expand the I/O capability of the attached

compute node.
Note: The use of the PCIe Expansion Node requires that the x240 Compute Node have both processors
installed.
For more information, see the Product Guide on the Flex System PCIe Expansion Node,
http://www.redbooks.ibm.com/abstracts/tips0906.html?Open
Flex System x240 Compute Node (E5-2600 v2)
Description
Flex System PCIe Expansion Node
Maximum
supported
1
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