CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the
problem.
Description
Reference
Designator
Volatility Description
User
Accessible
for external
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 mode
For DSC mode
using MXX
VBIOS include in system
BIOS (U52)
2Mb for nVidia N17P-Q1
2Mb for nVidia N17P-Q3
4Mb for AMD F16M-S2-50
Baffin Pro WX4150
4Mb for AMD F16M-S1-30
Baffin LE WX4130
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
Statement of Volatility – Dell Precision 7520
The Dell Precision 7520 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 7520 system board.
Table 1. List of Non-Volatile Components on System Board
Month yyyy
Description
Reference
Designator
Volatility Description
User
Accessible
for external
data
Remedial Action (Action
necessary to prevent loss of
data)
RTC CMOS
– BBRAM
(battery
backed up)
JRTC
Non Volatile memory, 64 Bytes.
Stores CMOS information.
No
N/A
Video
memory –
frame buffer
For SG mode
using system
DDR4
For DSC mode
using MXM
VRAM
Volatile memory in off state.
SG mode uses main system
memory size allocated out of
main memory.
Discrete graphic mode:
4 GB GDDR5 for nVidia N17P-
Q1 discrete graphics systems.
4GB GDD5 for nVidia
N17P-Q3
4GB GDD5 for AMD F16M-
S2-50 Baffin Pro WX4150
2GB GDD5 for AMD F16M-
S1-30 Baffin LE WX4130
No
N/A
Hard drive(s)
User replaceable
Non Volatile magnetic media,
various sizes in GB. May also be
SSD (solid state flash drive) and
Hybrid HDD.
Yes
Low level format
PD controller
EEPROM
UT20
(daughter board)
Non Volatile memory, 8 Mbit
(1MB), Power Delivery and type
C operation
No
N/A
Thunderbolt
controller
EEPROM
UT1
(daugher board)
Non Volatile memory, 8 Mbit
(1MB), Thunderbolt/type C
operation
No
N/A
TPM controller
U637
Non Volatile memory, 16K
bytes flash
No
N/A
USH
U1
(daughter board)
Non Volatile memory, 32 Mbit
(4MB), for Control Vault
operation
No
N/A
CAUTION: All other components on the system board lose data if power is removed from the system. Primary power loss
(unplugging the power cord and removing the battery) destroys all user data on the memory (DDR4, 2400 MHz).
Secondary power loss (removing the on-board coin-cell battery) destroys system data on the system configuration and
time-of-day information.
© 2012 Dell Inc.
Trademarks used in this text: Dell™, the DELL logo, Dell Precision™, OptiPlex™, Latitude™, PowerEdge™, PowerVault™, PowerConnect™,
OpenManage™, EqualLogic™, KACE™, FlexAddress™ and Vostro™ are trademarks of Dell Inc. Intel®, Pentium®, Xeon®, Core™ and Celeron® are
registered trademarks of Intel Corporation in the U.S. and other countries. AMD® is a registered trademark and AMD Opteron™, AMD Phenom™, and
AMD Sempron™ are trademarks of Advanced Micro Devices, Inc. Microsoft®, Windows®, Windows Server®, MS-DOS® and Windows Vista® are
either trademarks or registered trademarks of Microsoft Corporation in the United States and/or other countries. Red Hat Enterprise Linux® and
Enterprise Linux® are registered trademarks of Red Hat, Inc. in the United States and/or other countries. Novell® is a registered trademark and SUSE ™
is a trademark of Novell Inc. in the United States and other countries. Oracle® is a registered trademark of Oracle Corporation and/or its affiliates.
Citrix®, Xen®, XenServer® and XenMotion® are either registered trademarks or trademarks of Citrix Systems, Inc. in the United States and/or other
countries. VMware®, Virtual SMP®, vMotion®, vCenter®, and vSphere® are registered trademarks or trademarks of VMWare, Inc. in the United States
or other countries.
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