Dell PowerEdge FX2 and FX2s Enclosure Owner's Manual

I/O module and PCIe mezzanine card configuration guidelines

LOM network supports two Ethernet pass-through or switch modules.
To enable switch configuration before imaging the compute sleds, you must allow the I/O module(s) to power up before turning on the compute sleds.
Each half-width and quarter-width compute sled installed in the PowerEdge FX2s enclosure supports one PCIe mezzanine card. Each full-width compute sled supports two PCIe mezzanine cards. To locate the PCIe expansion bus slots in the compute sleds, see the relevant compute sled Owner's Manual at Dell.com/poweredgemanuals. The PCIe mezzanine cards are mapped to the PCIe expansion slots on the enclosure. For more information, see PCIe expansion slot mapping .
NOTE: Only PCIe mezzanine cards can be installed in the compute sleds. Non-PCIe mezzanine cards such as Ethernet, Fibre Channel, or InfiniBand mezzanine cards are not supported. If a non-PCIe mezzanine card is installed in the compute sled, the amber light blinks on the compute sled to indicate a mismatch, and the sled does not power on.