vYou can install both PCI and PCI-X adapters on the same bus. However, if you install a PCI adapter and a PCI-X adapter on the same bus, the PCI-X features of the PCI-X adapter will be disabled, and the adapter will function as a PCI adapter.

vYou can install PCI or PCI-X adapters of speeds faster than what is labeled for a particular PCI-X bus. For example, if you install two 133 MHz adapters into slots that are labeled as 100 MHz slots, the adapters will operate at 100 MHz.

vIf you install a 33 MHz and a 66 MHz adapter on the same bus, the bus speed will match that of the slowest adapter.

vIf a single 133 MHz adapter is installed on PCI-X bus B (slots 3 and 4) and the other slot on PCI-X bus B is empty, the adapter will operate at 133 MHz.

vThe server scans PCI-X slots in the following order: the xSeries 450 integrated devices are scanned first; then, PCI-X slots 1, 2, 6, 5, 3, and 4. If an RXE-100 enclosure is attached to an xSeries 450 server, the scan order is as follows: the xSeries 450 integrated devices are scanned first; then, PCI-X slots 1, 2, 6, 5, 3, and 4; then, the RXE-100 PCI slots 11, 12, 9, 10, 7, 8, 17, 18, 15, 16, 13, and 14.

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

Complete the following steps to install an adapter:

1.Read the safety information beginning on page 197 and “Installation guidelines” on page 77.

Attention: When you handle static-sensitive devices, take precautions to avoid damage from static electricity. For details about handling these devices, see “Handling static-sensitive devices” on page 78.

2.Disable the PCI-X slot through your operating system before you insert or remove a PCI or PCI-X adapter.

Note: Some operating systems do not support the enabling and disabling of a PCI-X slot. If your operating system does not support this function, turn off the server and peripheral devices, and disconnect the power cords and all external devices from the back of the server before proceeding.

3.Open the top cover.

4.Follow the cabling instructions, if any, that come with the adapter. Route the adapter cables before you install the adapter.

5.Follow the instructions that come with the adapter to set jumpers or switches, if any.

Chapter 4. Installing options 93

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IBM 8688 manual Installing options