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ASUS PR-DLS motherboard user guide
2-13
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 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. The following figure
shows the five PCI-X slots and one PCI slot on the motherboard.
PCI-X1
PCI-X2
PCI-X3
PCI-X4
PCI-X5
PCI6
PCI-X2 to
PCI-X1 PCI-X4 * PCI-X5
53C1010R 64-bit/133MHz PCI-X 64-bit/66MHz PCI-X 64-bit/66MHz PCI
64-bit/100MHz PCI-X
64-bit/133MHz PCI-X
53C1030 64-bit/133MHz PCI-X 64-bit/66MHz PCI-X 64-bit/100MHz PCI-X**
64-bit/100MHz PCI-X
64-bit/133MHz PCI-X
Onboard
SCSI
PCI-X Slot
PCI-X slots (PCI X1 to X5)
The motherboard may come with either the LSI
®
53C1010R or the LSI
®
53C1030 SCSI controller. Depending on the onboard SCSI controller, the
following table shows the varying bus speeds for the PCI-X slots according to
the PCI-X specification 1.0a.
*
Plugging in a card into one of the slots allow for 133MHz bus speed. Plugging in two
cards reduces the bus speeds to 100MHz for both cards. Plugging in three cards
allows for 66MHz for all three cards.
** PCI-X5 supports the AMI Express ZCR (Zero Channel RAID) card
PCI slot (PCI6)
PCI6 is a 32-bit/33MHz 5V PCI slot with a Low Pin Count (LPC) signal
connector to accommodate the ASUS Server Management Card. This slot
has the same specifications regardless of the onboard SCSI controller.