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Chapter 2 System Overview
Compaq Deskpro EXS and Workstation 300 Personal Computers
Featuring the Intel Pentium 4 Processor
First Edition – December 2000
2-12
2.4.4 SYSTEM MEMORY
These systems feature a dual-channel Direct Rambus (RDRAM) architecture. Capable of a peak
data throughput of 3.2 GB/sec., this high-performance memory design represents a new generation
of memory subsystems that can keep pace with ever-increasing processor performance. These
systems each provide a total of four RIMM sockets, all of which will be populated with either
PC800 RDRAM memory modules (RIMMs) or continuity modules (CRIMMs). Up to two
gigabytes of memory may be installed.
Compaq Deskpro EXS systems are shipped with non-ECC PC800 RIMMs. Compaq Deskpro
Workstation 300 systems are shipped with ECC PC800 RIMMs. Both systems support ECC and
non-ECC RIMMs.
2.4.5 MASS STORAGE
All models include a 3.5 inch 1.44-MB diskette drive installed as drive A. Most models also
include a CD-ROM drive. The Deskpro EXS and some Deskpro Workstation 300 models will
include a UATA100 (EIDE) hard drive while select Deskpro Workstation 300 models will include
an Ultra 160 SCSI controller (PCI) card and SCSI hard drive. Standard hard drives feature Drive
Protection System (DPS) support, which uses industry-standard function ATAPI-5 to check drive
integrity. Standard drives also use SMART III technology that tests drive data during periods of
drive inactivity for corruption.
2.4.6 SERIAL, PARALLEL INTERFACES
All models include two serial ports and a parallel port accessible at the rear of the chassis. Each
serial port is RS-232-C/16550-compatible and supports standard baud rates up to 115,200 as well
as high-speed baud rates of 230K and 460K, and uses a DB-9 connector. The parallel interface is
Enhanced Parallel Port (EPP1.9) and Enhanced Capability Port (ECP) compatible, and supports
bi-directional data transfers through a DB-25 connector.
2.4.7 UNIVERSAL SERIAL BUS INTERFACE
All models feature four Universal Serial Bus (USB) ports that provide a 12Mb/s interface for
peripherals. The USB provides hot plugging/unplugging (Plug ’n Play) functionality.