Reference Guide

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Statement of Volatility – Dell Precision 7720
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the
problem.
The Dell Precision 7720 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 7720 system board.
Table 1. List of Non-Volatile Components on System Board
Description
Reference
Designator
Volatility Description
User
Accessi
ble for
externa
l data
Remedial Action (Action
necessary to prevent loss of
data)
Embedded
Flash in
embedded
controller
MEC5085
U51
288 KB of embedded Flash
memory for keyboard controller
BIOS code, asset tag and BIOS
passwords.
4K Boot block protection.
No
N/A
Panel EEDID
EEPROM
Part of panel
assembly
Non Volatile memory, 512 bytes.
No
Part of panel assembly
System BIOS
U52(16MB)
Non Volatile memory, 128 Mbit (16
MB), System BIOS and Video BIOS
for basic boot operation, PSA (on
board diags), PXE diags.
No
N/A
Video BIOS
For SG
For DSC mode
using MXM
VBIOS include in system BIOS
(U52)
Discrete graphic mode:
2Mb for nVidia N17P-Q1
4Mb for nVidia N17E-Q1
4Mb for nVidia N17E-Q3
4Mb for nVidia N17E-Q5
4Mb for AMD F16M-S1-30 Baffin
LE
4Mb for AMD Ellesmere XT
No
N/A
System
Memory –
DDR4
memory
Four SODIMM
connectors:
JDIMM1,2,3,4
Volatile memory in OFF state
Two to four modules must be
populated. System memory size will
depend on SODIMM modules and up
to 64 GB.
No
Power off system
System
memory SPD
EEPROM
On memory
SODIMM(s) –
1-4 present
Non Volatile memory 512 Bytes.
Stores memory manufacturer data and
timing information for correct
operation of system memory.
No
N/A