White Papers
August 2019
Statement of Volatility – Dell Precision 3431 Small Form Factor
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.
The Dell Precision 3431 Small Form Factor 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 Dell Precision 3431 Small Form Factor 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-NU
U118
2K bytes of on-chip ROM and 256 bytes of on-
chip RAM
No
N/A
System BIOS
SPI1
Non-volatile memory, 256 Mbits (32 MB),
System BIOS and Video BIOS for basic boot
operation, ePSA (on board diagnostics.)
No
N/A
TPM Nuvoton
NPCT750JAAY
X
TPM
16K bytes non-volatile memory located in the
TPM module.
No
N/A
Type-C
Controller-
CCG4 PD
CCG4_4125
EZ-PD CCG4 uses Cypress’s proprietary
M0S8 technology with a 32-bit, 48 MHz
ARM® Cortex®-M0 processor with 128 KB
flash
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 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 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.
SD Memory
Card
User
replaceable
Non-volatile magnetic media, various sizes in
GB.
Yes
Low level format.
M.2 Solid
State Disk
User
replaceable
Non-volatile magnetic media, various sizes in
GB.
Yes
Low level format.
Hard drive
User replaceable
Non-volatile magnetic media, various sizes in
GB.
Yes
Low level format.