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ASUS PR-DLSW 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 Ultra3 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 five PCI-X slots and one PCI
slot on the motherboard.
PCI-X slots (PCI X1 to X5)
The motherboard comes with the LSI
®
53C1010R 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 or four
cards allows for 66MHz for all the cards.
PCI slot (PCI6)
PCI6 is a 32-bit/33MHz 5V PCI slot.
Number of
cards installed PCI-X1 to PCI-X4 * PCI-X5
1 64-bit/133MHz PCI-X 64-bit/66MHz PCI
2 64-bit/100MHz PCI-X
3 or 4 64-bit/66MHz PCI-X
PCI-X1
PCI-X2
PCI-X3
PCI-X4
PCI-X5
PCI6