Dell Precision 7520 User Manual

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.

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