Datasheet

IBM Flex System PCIe Expansion Node 3
Features
The PCIe Expansion Node has the following features:
Support for up to four standard PCIe 2.0 adapters:
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Two PCIe 2.0 x16 slots that support full-length, full-height adapters (1x, 2x, 4x, 8x, and 16x
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adapters supported)
Two PCIe 2.0 x8 slots that support low-profile adapters (1x, 2x, 4x, and 8x adapters supported)
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Support for PCIe 3.0 adapters by operating them in PCIe 2.0 mode
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Support for one full-length, full-height double-wide adapter (consuming the space of the two
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full-length, full-height adapter slots)
Support for PCIe cards with higher power requirements
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The Expansion Node provides two auxiliary power connections, up to 75W each for a total of 150W of
additional power using standard 2x3, +12V six-pin power connectors. These connectors are placed
on the base planar so that they both can provide power to a single adapter card (up to 225W), or to
two adapters (up to 150W each). Power cables are used to connect from these connectors to the
PCIe adapters and are included with the PCIe Expansion Node.
Two Flex System I/O expansion connectors
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The I/O expansion connectors are labeled I/O expansion 3 connector and I/O expansion 4 connector
in Figure 2. These I/O connectors expand the I/O capability of the attached compute node.
The layout of the PCIe Expansion Node is shown in Figure 2. The four PCIe slots are routed through two
riser connectors on the system planar.
Figure 2. Layout of the PCIe Expansion Node