2.6.3 PCI slots

This motherboard 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 Ultra320 SCSI. 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. The following figure shows the four PCI-X slots and two PCI slots on the motherboard.

PCI-X4

PCI-X3

PCI-X2

PCI-X1

PCI2

PCI1

The PCI-X1 slot on PU-DL models is colored white.

PCI-X slots (PCI X1 to X4)

The PCI-X bus speeds vary depending on the number of expansion cards installed on the slots.

PCI Bus

Onboard device

Card installed

PCI-X bus speed

 

 

 

 

Channel A

Intel 82544GC PCI-X LAN

None

133 MHz

 

 

One (on PCI-X3 or PCI-X4)

100 MHz

 

 

Two (on PCI-X3 and PCI-X4)

66 MHz

 

 

 

 

Channel B

Adaptec AIC-7902W

None

133 MHz

 

PCI-X Ultra-320 SCSI

One (on PCI-X1 or PCI-X2)

100 MHz

 

 

Two (on PCI-X1 and PCI-X2)

66 MHz

 

 

 

 

*PCI-X1 slot on PU-DLS models supports a ZCR (Zero Channel RAID) card.

ZCR functions are not supported on PU-DL models. See section “2.8 Connectors” for more information on this slot.

PCI Bus Channel B as illustrated above applies only on PU-DLS models.

PCI1/PCI2 slots

PCI1 and PCI2 are 32-bit/33MHz 5V PCI slots. PCI1 has a Low Pin Count (LPC) signal connector to accommodate the ASUS Server Management Card. The PCI bus speed for these slots is fixed at 33MHz.

ASUS PU-DLS/PU-DL motherboard user guide

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