Product guide

IBM Flex System x440 Compute Node 20
I/O expansion options
The x440 has four I/O expansion connectors for attaching I/O adapter cards, as shown in Figure 6. There
is a fifth expansion connector (under I/O adapter 4) designed for future expansion options. The I/O
expansion connector is a very high-density 216-pin PCIe connector. Installing I/O adapter cards allows
the server to connect with switch modules in the IBM Flex System Enterprise Chassis. Each slot has a
PCI Express 3.0 x16 host interface and all slots support the same form-factor adapters.
Note: A second processor must be installed in order to use I/O adapter slots 3 and 4 in the x440 compute
node. This is because the PCIe lanes used to drive I/O slots 3 and 4 are routed to processors 2 and 4.
Figure 6 shows the location of the I/O expansion connectors.
Figure 6. Location of the I/O adapter slots in the IBM Flex System x440 Compute Node