Administrator Guide

07/2020
Statement of Volatility – Dell Precision 3551
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the
problem.
The Dell Precision 3551 contains both volatile and non-volatile (NV) components. Volatile components lose their data
immediately after power is removed from the component. Non-volatile (NV) components continue to retain their data even
after power is removed from the component. The following NV components are present on the 3551’s system board.
Table 1. List of Non-Volatile Components on System Board
Description
Reference
Designator
Volatility Description
User
Accessible
for external
data
Remedial Action (Action necessary to
prevent loss of data)
Panel
EEDID
EEPROM
Part of panel
assembly
Non Volatile memory,
128bytes.
No
Part of panel assembly
System
BIOS
UC5
Non Volatile memory, System
BIOS, embedded controller
and Video BIOS for basic boot
operation, PSA (on board
diags), PXE diags.
No
N/A
System
Memory –
DDR4
memory
Two
SODIMM
connectors:
JDIMM1,2
present
Volatile memory in OFF state
NOTE: See state definitions
later in text.
One to Two modules must be
populated.
Yes
Power off system
System
memory
SPD
EEPROM
On System
memory
SODIMM(s)
JDIMM1,2
present
Non Volatile memory 512
Bytes.
Stores memory manufacturer
data and timing information
for correct operation of system
memory.
No
N/A
RTC
CMOS –
BBRAM
(battery
backed up)
UC1
Non Volatile memory, 256
Bytes.
Stores CMOS information.
No Remove the onboard
coin cell
battery
Video
memory –
frame
buffer
For UMA
platform:
using system
DDR4
For DSC
platform:
UV17, UV18
UV19, UV20
Volatile memory in off state.
UMA uses main system
memory size allocated out of
main memory.
Discrete graphics system uses
4GB GDDR5.
No
Security
Controller
U2 (up-sell
USH
Non Volatile memory, 128
Mbit
(16Mbyte)
No N/A