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Note: To change the startup sequence, start the Setup utility and select Start
Options from the main menu. See “Using the Setup utility” on page 96 for
details about using the Setup utility.
v The PCI Express 2.0 bus configuration is as follows:
– Expansion slot 1 is x16, slot 2 is x8 (x4 lanes), and slots 3 through 6 are x8.
– Expansion slot 7 is a non-standard, 106-pin connector but accepts PCI Express
x8, x4, and x1 standard adapters.
– Expansion slots 1 through 4 are non-hot-plug, full-length PCI Express 2.0 and
can accept adapters up to 312.00 mm (12.28 inches) long.
– Expansion slots 5 through 7 are non-hot-plug, half-length PCI Express 2.0 and
can accept adapters up to 167.65 mm (6.6 inches) long.
Attention: Static electricity that is released to internal server components when
the server is powered on might cause the server to halt, which might result in the
loss of data. To avoid this potential problem, always use an electrostatic-discharge
wrist strap or other grounding system when you work inside the server with the
power on.
To install a PCI Express adapter, complete the following steps.
1. Read “Safety” on page v and “Installation guidelines” on page 38.
2. Turn off the server and peripheral devices, and disconnect the power cords
and all external cables.
3. Remove the server cover (see “Removing the top cover” on page 44) and
determine which PCI Express expansion slot you will use for the adapter.
4. See the documentation that comes with the adapter for instructions for setting
jumpers or switches and for cabling.
Note: Route adapter cables before you install the adapter.
Adapter
Adapter
retention
latch
Pin
Pin hole
Expansion
slot cover
5. Push the adapter retention latch toward the rear of the server and open the
tab.
6. Remove the expansion-slot cover.
Attention: When you install an adapter, avoid touching the components and
gold-edge connectors on the adapter. Make sure that the adapter is correctly
seated in the connector. Incorrectly seated adapters might cause damage to the
I/O board or to the adapter.
48 IBM System x3850 X5 and x3950 X5 Types 7145, 7146, 7143, and 7191: Installation and User's Guide