Dell OptiPlex E1 Service Manual page 10

Main memory for the OptiPlex E1 system ranges from a minimum of 16 MB to
a maximum of 256 MB. All main memory is implemented using high-speed
non-ECC DIMMs. One to two DIMMs, ranging in memory capacity sizes from
16 to 128 MB, may be used to provide a maximum memory capacity of
256 MB.
The system BIOS is implemented in flash ROM, which allows for easy BIOS
upgrades using diskette files or files downloaded from Dell's home page on
the World Wide Web (www.dell.com), or via remote flash. The BIOS also
incorporates the POST diagnostics, which tests the system each time the sys-
tem is started.
The EIDE subsystem implemented on the system board provides two Mode-4,
DMA bus-mastered EIDE interfaces, each of which can support up to two
EIDE devices (for example, CD-ROM drive, hard-disk drive, and so on). The
EIDE controller attaches to the high-speed PCI local bus.
The primary EIDE interface (IDE1) provides support for up to two high-
performance EIDE devices. The computer's boot drive should be connected to
the primary EIDE interface.
The secondary EIDE interface (IDE2) also provides support for up to two high-
performance EIDE devices, typically EIDE tape drives or CD-ROM drives.
NOTE: Any externally accessible drive bays at the front of the computer are
normally used for diskette, CD-ROM, and/or tape drives. Hard-disk drives
should be installed in the internal hard-disk drive positions described in "Hard-
Disk Drive Service Information" found later in this chapter.
As a standard feature, OptiPlex E1 systems are equipped with Self-Monitoring
and Analysis Reporting Technology (SMART), which warns you at system start-
up if your hard-disk drive has become unreliable. This warning occurs only if
you use hard-disk drives with SMART technology.
The OptiPlex E1 system is equipped with an integrated diskette drive controller
(PIIX4e) that can support a maximum of two non-EIDE diskette and tape drives
via a 34-pin DSKT connector located on the system board. The low-profile
chassis can accommodate only one external drive device (diskette drive or tape
drive).
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