White Papers

May 2021
Statement of Volatility – Dell OptiPlex 7090 Tower
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.
The Dell OptiPlex 7090 Tower contains both volatile and non-volatile components. Volatile components lose
their data immediately after power is removed from the component. Non-volatile components continue to
retain their data even after power is removed from the component. The following Non-volatile components are
present on the OptiPlex 7090 Tower 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
Microchip
DEC1515H-
D0-I/Z2
EC
256K bytes Code/Data SRAM(224 KB
optimized for code performance, 32 KB
optimized for code performance), 64 bytes
Battery Powered Storage SRAM
No
N/A
System BIOS
U2502
Non-volatile memory, 256Mbits(32 MB),
System BIOS and Video BIOS for basic
boot operation, ePSA (on board
diagnostics.)
No
N/A
TPM
Nuvoton
NPCT750JA
DYX
U9101
16K bytes non-volatile memory located in
the TPM module.
No
N/A
System
Memory –
DDR4 DIMM
memory
Connectors:
DIMM1, DIMM2,
DIMM3,
DIMM4,
Volatile memory in OFF state (see state
definitions later in text)
One or two modules will be populated.
System memory size will depend on DIMM
modules and will be between 4 GB to 128
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
RTC
Volatile battery back-backed CMOS
memory 256 bytes. Stores CMOS
information.
No
Removing the on board
Coin Cell battery.
Video
memory –
type – see
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
below.
M.2 Solid
State Disk
User
replaceable
Non-volatile magnetic media, various sizes
in GB.
Yes
Low level format.