The following illustration shows the location of the 33 MHz PCI slots on the system board.

PCI slot 1 32-bit 33 MHz (J29)

PCI slot 2 32-bit 33 MHz (J31)

PCI slot 3 64-bit 33 MHz (J35)

PCI slot 4 64-bit 33 MHz (J39)

PCI slot 5 64-bit 33 MHz (J40)

Adapter considerations

Before you install adapters, review the following:

Locate the documentation that comes with the adapter and follow those instructions in addition to the instructions given in this chapter. If you need to change switch or jumper settings on your adapter, follow the instructions that come with the adapter.

You can install full-length adapters in all PCI slots.

You can install a 32-bit adapter in any of the PCI slots, but you might want to install it in a 32-bit slot and use the 64-bit slots for 64-bit adapters.

The server supports 5.0V and universal PCI adapters; it does not support 3.3V adapters.

The server uses a rotational interrupt technique to configure PCI adapters. Because of this technique, you can install a variety of PCI adapters that currently do not support sharing of PCI interrupts.

The server has two PCI buses. PCI slots 1 and 2 are on PCI bus A and PCI slots 3, 4, and 5 are on PCI bus B.

Note: PCI bus A is sometimes referred to as bus 0; PCI bus B is sometimes referred to as bus 1.

The system scans PCI slots 1 through 5 to assign system resources; then the system starts (boots) the PCI devices in the following order: PCI slots 1 and 2, system board SCSI devices, and then PCI slots 3 through 5.

If you plan to use the Wake on LAN (WOL) function in the server, you must install a Wake on LAN-enabled NIC adapter in PCI slot 1, and install the Wake on LAN cable that comes with the Wake on LAN adapter to connect this adapter to the system board. You must use a Wake on LAN-enabled adapter as identified in the xSeries 220 ServerProven list at http://www.ibm.com/pc/compat/. Only PCI slot 1 supports a Wake on LAN-enabled adapter. For additional information on the Wake on LAN function, adapters, and cables, refer to the documentation that comes with the Wake on LAN adapters.

If you plan to use the optional system management adapter in the server, you must install the optional system management adapter in PCI slot 2. Only PCI slot

64Hardware Maintenance Manual: xSeries 220

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IBM XSERIES 220 manual Adapter considerations