Dell Dimension XPS 50 Reference Manual page 22

1-4 Dell Dimension XPS Txxx and Txxxr Systems Reference and Troubleshooting Guide
You can expand your system's memory up to 768 MB by installing additional 72-pin,
100-MHz ECC or non-ECC SDRAM DIMMs in the DIMM sockets on the system
board. Purchasing memory upgrades from Dell Spare Parts ensures system compati-
bility; these upgrades are also covered under your system warranty. Refer to " Adding
Memory" in Chapter 2 before purchasing a memory upgrade.
Dell offers a wide variety of drives that can be installed in your system, including the
following options:
ATA-33 Ultra DMA hard-disk drives
ATA-66 Ultra DMA hard-disk drives (for use with ATA-66 controller cards)
EIDE tape drives
Zip drives with removable media
SCSI hard-disk drives
To order any of these upgrades, call Dell.
The following sections contain maintenance procedures that you should perform reg-
ularly to keep the system in top operating condition.
Everyone inadvertently deletes files at one time or another, viruses can corrupt files,
and hard-disk drives can fail after extended use. To avoid data loss, regularly back up
the data files on the hard-disk drive. If you should lose the contents of your hard-disk
drive, you can reinstall programs, but your data files will be lost if you do not have a
backup.
Your Dell-installed drivers and online documentation are preserved on the Dell Dimen-
sion ResourceCD. Use this CD to restore the drivers and documentation that came on
your Dell-installed hard-disk drive.
NOTE: In case of warranty replacement of your hard-disk drive, you will receive a
blank, formatted drive from Dell. You must reinstall application programs and restore
data files.
Dell recommends that you back up the hard-disk drive at least once a week, with a daily
backup of those files that have been changed. Following these guidelines ensures the
loss of no more than a day's work. As further insurance against data loss, keep dupli-
cate copies of the weekly and monthly backups at an off-site location. Doing so ensures
that you lose no more than a week's work, even if one of the on-site backups becomes
corrupted.