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ASUS NR-LSR motherboard user guide
2-11
2.6 Expansion slots
This motherboard has a 64-bit/133MHz PCI expansion slot that
accommodates a dual slot riser card. The riser card implements the PCI-X
(Peripheral Component Interconnect Extended) bus technology to support up
to 133MHz data transfers, or about 1.06GB/s. This bus technology is primarily
designed for servers to increase the performance of high bandwidth devices
such as Gigabit Ethernet cards and Ultra3 SCSI interfaces. PCI-X is backward
compatible with the earlier PCI bus technology making it possible to install
PCI and PCI-X cards at the same time, but the bus speed will be that of the
slowest card.
Installing a card into one of the slots allows for 133MHz bus speed.
Installing two cards reduces the bus speeds to 100MHz for both cards.
2.6.1 Installing an expansion card
Follow these steps to install an expansion card.
1. Before installing the expansion card, read the documentation that
came with it and make the necessary hardware settings for the card.
2. Remove system cover and detach the riser card module from the
expansion slot.
3. Install the expansion card into one of the PCI-X slots on the riser card.
4. Re-install the riser card into the system.
5. Replace the system cover.
Make sure to unplug the power cord before adding or removing
expansion cards. Failure to do so may cause you physical injury and
damage motherboard components.
Refer to the AP160R-S system user guide for details on expansion
card installation.