Reference Guide

November 2015
Statement of Volatility
Dell Precision Tower 3420 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 Tower 3420 Small Form Factor contains both “volatile” and “non-volatile” (NV)
components. Volatile components lose their data immediately upon removal of power from the
component. Non-volatile components continue to retain their data even after the power has been removed
from the component.
The following volatile and NV components are present on the Dell Precision Tower 3420 Small Form Factor
motherboard:
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 lose data)
Embedded
Flash memory in
embedded
controller SMSC
SCH5555V-NU
U118 2K of on-chip ROM and
256 bytes of on-chip
RAM
No N/A
System BIOS SPI1 Non-volatile memory,
128Mbits(16MB), System
BIOS and Video BIOS for
basic boot operation,
ePSA (on board
diagnostics.)
No N/A
TPM Nuvoton
NPCT650JA0YX
UF1 24K 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 to four modules will
be populated. System
memory size will depend
on DIMM modules and
will be between 4GB to
32GB.
Yes Power off system.