Product guide

IBM System x3500 M4 31
I/O expansion options
The server supports up to eight PCIe slots: six slots (1 to 6) when one CPU is installed or eight slots when
two CPUs are installed. These are the slot form factors:
Slot 1: PCIe x8 (x4 wired); full-height, half-length (supports optional PCI-X interposer card)
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Slot 2: PCIe x8; full-height, half-length
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Slot 3: PCIe x8; full-height, full-length
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Slot 4: PCIe x8 (x4 wired); full-height, full-length
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Slot 5: PCIe x16; full-height, full-length
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Slot 6: PCIe x8 (x4 wired); full-height, full-length
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Slot 7: PCIe x16; full-height, full-length (requires second processor)
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Slot 8: PCIe x16; full-height, full-length (requires second processor)

All PCIe slots are PCI Express 3.0 slots except Slot 1, which is a PCI Express 2.0 slot. Slot 1 can be
converted to a PCI-X slot with the PCI-X Conversion Kit, which is described in the following table.
Table 12. PCI riser card options
Part number Feature
code
Description Maximum
supported
81Y7012 A1G3 PCI-X Interposer Conversion Kit 1