Dell OptiPlex GX1 - Page 27

System Overview 1-15
0LQL7RZHU&RPSXWHU·V([SDQVLRQ&DUG6ORWV
The mini tower computers have seven expansion-card slots. The riser board
has four ISA expansion-card connectors and five PCI expansion-card connec-
tors. Two PCI expansion-card connectors share expansion-card slots with two
ISA connectors, resulting in a total of seven expansion-card slots (see
Figure 1-11). The riser board is active, incorporating PCI-to-PCI bridging.
The mini tower riser board includes the P1 connector (for connecting the NIC
to the riser board cable) and an LED. If the LED is on, the riser board is receiv-
ing power; if off, the riser board is not receiving power.
)LJXUH5LVHU%RDUGIRUWKH0LQL7RZHU&RPSXWHU
8SJUDGH2SWLRQV
The system board has various accommodations for system upgrades
including:
 Microprocessor upgrade
 Main memory expansion
 Video memory expansion
These upgrades are summarized in the following subsections, and installation
procedures are provided for the various chassis configurations in Chapters 4, 5,
6, and 7.
0LFURSURFHVVRU/&DFKH8SJUDGHV
On the OptiPlex GX1 and OptiPlex NX1 systems, the microprocessor and sec-
ondary L2 cache memory are implemented in an SEC cartridge/heat sink
assembly. Upgrade to a higher-performance microprocessor is accomplished
by snapping out the old assembly and installing an upgrade assembly as
higher-performance microprocessors become available.
ISA4
ISA1
HDLED
connector
P1 connector
PCI1
PCI5
ISA2
PCI2
PCI3
ISA3
LED
PCI4