Reference Guide

Description
Reference
Designator
Volatility Description
User
Accessible
for
external
data
Remedial Action (Action
necessary to prevent loss of
data)
RTC CMOS
– BBRAM
(battery
backed up)
U3
Non-volatile memory,
64 Bytes.
Stores CMOS information.
No
N/A
Video
memory –
frame buffer
On GFx
cards (G92
or G94):
U2A, U2B,
U3A, U3B,
U4A, U4B,
U5A, U5B,
U6A, U6B,
U7A, U7B,
U8A, U8B,
U9A, U9B
Volatile memory in off state.
1 GB GDDR3 for G92 discrete
graphics systems.
256 MB GDDR3 for
G94 discrete graphics
systems.
No N/A
LOM Serial
Flash
Memory
U18
Non-volatile memory, 8 Mbit
(2 MB) MAC address, LED
mode, WOL settings, PXE
settings.
No
N/A
Hard drive(s)
User
replaceable
- one or
two.
Non-volatile magnetic
media, various sizes in GB.
May also be SSD (solid state
flash drive).
Yes Low-level format
CD-
ROM/RW/
DVD/
DVD+RW/
Diskette
Drives
User
replaceable
Non-volatile optical media. Yes Low-level format/erase
CAUTION: All other components on the system board lose data if power is removed from the system. Primary
power loss (unplugging the power cord and removing the battery) destroys all user data on the memory
(DDR3, 1067 MHz). Secondary power loss (removing the on-board coin-cell battery) destroys system data on
the system configuration and time-of-day information.
______________
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2012 Dell Inc.
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