A-2 Dell OptiPlex GXa Mini Tower Systems Reference and Installation Guide
Expansion Bus
Bus types. . . . . . . . . . . . . . . . . . . . . . . . . . . PCI and ISA
Bus speed . . . . . . . . . . . . . . . . . . . . . . . . . . PCI: 33 MHz
ISA: 8.33 MHz
PCI expansion-card connectors . . . . . . . . . five (two PCI connectors share card-slot
openings with ISA connectors)
ISA expansion-card connectors. . . . . . . . . . four (two ISA connectors share card-slot
openings with PCI connectors)
ISA expansion-card connector size. . . . . . . 98 pins
ISA expansion-card connector data width (maximum)16 bits
PCI expansion-card connector size. . . . . . . 120 pins
PCI expansion-card connector data width (maximum)32 bits
Memory
Architecture . . . . . . . . . . . . . . . . . . . . . . . . 64-bit (non-parity) or 72-bit (ECC),
noninterleaved
DIMM sockets . . . . . . . . . . . . . . . . . . . . . . three
DIMM capacities . . . . . . . . . . . . . . . . . . . . 16-, 32-, 64-, and 128-MB SDRAM
Standard RAM . . . . . . . . . . . . . . . . . . . . . . 16 MB minimum
Maximum RAM . . . . . . . . . . . . . . . . . . . . . 384 MB
BIOS address . . . . . . . . . . . . . . . . . . . . . . . F0000h
Drives
Externally accessible bays . . . . . . . . . . . . . three 5.25-inch bays for diskette, tape, or
CD-ROM drives; one 3.5-inch bay for a dis-
kette drive
Internally accessible bays. . . . . . . . . . . . . . two 3.5-inch bays: one for a 1-inch-high
hard-disk drive and one for a 1.6-inch-high
hard-disk drive
Table A-1. Technical Specifications (continued)
NOTE: For the full name of an abbreviation or acronym used in this table, see the Glossary in the
online System User’s Guide.