Compaq 247320-003 - Deskpro 4000 - 5166 Model 2500/CDS Reference Manual page 8

Microsoft Windows 95 operating system installed on
Pentium-based models; Microsoft Windows NT
Workstation 4.0 operating system installed on Pentium II–
based models
Compaq-supplied drivers and utilities
Pentium processor with MMX technology at 166-MHz,
200-MHz, or 233-MHz; or Pentium II processor at 233-
MHz, 266-MHz, or 300-MHz
Pentium-based models include Enhanced 64-bit
graphics with accelerated 3D; includes 2-megabytes
SGRAM, expandable to 4-megabytes SGRAM
Pentium II–based models include either the Matrox
Performance graphics controller with 2-megabytes
SGRAM, and expandable to 4-megabytes SGRAM, or the
Matrox Millennium-II AGP graphics controller with 4-
megabytes WRAM and expandable to 16-megabytes
WRAM
One Ultra ATA hard drive installed; hard drive size is either
2.4 or 3.2 gigabytes
The hard drives are partitioned into two logical drives.
CD-ROM drive models include a 16X MAX or 24X MAX
slot-load CD-ROM drive, embedded 16-bit audio, and an
internal 2.5-inch speaker mounted on the removable
expansion board cage
Pentium II processor at 233-MHz, 266-MHz, or
300-MHz
Embedded Ultra-SCSI controller
Matrox Millennium-II AGP graphics controller;
includes 4-megabytes WRAM, expandable to 16-
megabytes WRAM
One Ultra-SCSI hard drive installed; hard drive sizes range
from 2.1 to 4.3 gigabytes
The hard drives are partitioned into two equally sized
logical drives.
All models include a 24X MAX slot-load CD-ROM drive
and an internal 2.5-inch speaker mounted on the removable
expansion board cage