Dell POWEREDGE 4300 Service Manual page 16

The computer system offers advanced expansion subsystems that can support
a mixture of traditional ISA expansion cards, Plug and Play ISA expansion cards,
and PCI expansion cards. The Resource Configuration Utility (RCU) included with
the system provides a means of avoiding resource conflicts that might arise from
such an arrangement.
After all legacy cards have been configured with the RCU, the system automat-
ically assigns any required memory space, IRQ lines, and DMA channels to any
installed Plug and Play ISA expansion cards and PCI expansion cards the next
time the system is rebooted. Chapter 5, "Using the Resource Configuration
Utility," in the Dell PowerEdge 4300 Systems User's Guide describes the RCU and
provides instructions for using it to configure the system.
The expansion-card slots include six PCI expansion-card connectors and two
ISA expansion-card connectors. Two of the PCI connectors share expansion-
card slots with the two ISA connectors. The expansion-card connectors are
located on the system board (see Figure 1-13).
The video subsystem is built into the system board and consists of an AGP
VGA-compatible video subsystem with an ATI 3D Rage Pro SVGA video
controller. The video subsystem contains 2 MB of SGRAM video memory,
which is not upgradable. Noninterlaced resolutions are 640 x 480 (16.7 million
colors), 800 x 600 (16.7 million colors), and 1024 x 768 (256 colors).
An integrated Adaptec AIC-7890 Ultra2/LVD SCSI-3 host adapter supports up
to six 1- or 1.6-inch internal SCSI hard-disk drives through a 68-pin connector on
the system board for a SCSI backplane board. The SCSI backplane board
automatically configures SCSI ID numbers and SCSI termination on individual
hard-disk drives, greatly simplifying drive installation. The integrated SCSI con-
troller resides on the PCI local bus for optimum performance.
An integrated Adaptec AIC-7860 Ultra/Narrow SCSI-3 host adapter attached to
the PCI bus supports up to three SCSI devices in the external drive bays
through a 50-pin connector on the system board.
Dell PowerEdge 4300 systems include a SCSI backplane board, which greatly
simplifies cabling and configuration for SCSI hard-disk drives. SCSI ID and ter-
mination for SCSI hard-disk drives are both configured by the SCSI backplane
board, rather than on individual drives. SCSI hard-disk drives are supplied by
Dell in special drive carriers that fit in the internal drive bays.
NOTE: For maximum performance, install Ultra2/LVD drives exclusively.
Although you can install a mixture of Ultra2/LVD and Ultra hard-disk drives,
they will operate at the slower Ultra transfer rate.
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