Asus PU-DL Manual pdf format file for PU-DLS/PU-DL M/B - Page 39

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 2-13