Reference Guide

DELL CONFIDENTIAL Page 1
Internal Use - Confidential
Statement of Volatility – Dell OptiPlex XE2
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the
problem.
The Dell OptiPlex XE2 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 XE2’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)
Embedded Flash
memory in embedded
controller SMSC
SCH5555-NS
UO1
2K bytes of on-chip ROM and 256
bytes of on-chip RAM
No
N/A
System BIOS
SPI1/SPI3
Non-volatile memory, 32 Mbits/64
Mbits (4 MB/8 MB), System BIOS
and Video BIOS for basic boot
operation, (on board diagnostics.)
No
N/A
TPM ST
ST33ZP24AR28PVSP
TPM
4K bytes non-volatile memory
located in the TPM module.
No
N/A
System Memory –
DDR3 DIMM
memory
Connectors:
DIMM1,
DIMM2,
DIMM3,
DIMM4
Volatile memory in OFF state
Note : See state definitions later in
text.
One to four modules will be
populated. System memory size will
depend on DIMM modules and will
be between 4 GB to 64 GB.
Yes
Power off system.
System memory SPD
EEPROM
On memory
DIMM(s)
Non-volatile EEPROM memory.
(256 bytes). One device present on
each DIMM.
Stores memory manufacturer data
and timing information for correct
operation of system memory.
No
N/A
RTC CMOS
BATTERY
Volatile battery back-backed CMOS
memory 256 bytes. Stores CMOS
information.
No
Removing the onboard
Coin Cell battery.
Video memory – type –
see the next column
UMA
architecture-
uses system
memory.
Volatile memory in off state.
UMA uses main system memory
size allocated out of main memory.
No
Enter S3-S5 state.