HP Z Series User Manual

Table 11-1 Troubleshooting steps for nonvolatile memory usage (continued)
Nonvolatile
memory type
Amount (Size) Does this
memory
store
customer
data?
Does this
memory
retain data
when
power is
removed?
What is the
purpose of
this
memory?
How is data entered into
this memory?
How is this memory
write-protected?
DIMM Serial
Presence
Detect (SPD)
configuration
data
256 bytes per
memory
module, 128
bytes
programm-
able (not
customer
accessible)
No Yes Stores
memory
module
information.
DIMM SPD is
programmed by the
memory vendor.
Data cannot be
written to this
memory when the
module is installed
in a computer.
The specific write-
protection method
varies by memory
vendor.
System BIOS 32 MB Yes Yes Stores
system BIOS
code and
computer
configuration
data.
System BIOS code is
programmed at the
factory. Code is updated
when the system BIOS
is updated. Configuration
data and settings
are entered using the
Computer Setup (BIOS)
or a custom utility.
NOTE: Writing data
to this ROM in an
inappropriate manner
can render the
computer non-
functional.
A utility must be
used for writing
data to this memory
and is available on
the HP website; go
to
http://www.hp.com/
support. Select Find
your product, and
then follow the on-
screen instructions.
Intel
Management
Engine
Firmware
(present only in
select Elite or Z
models. For
more
information, go
to HP Support.
Select Identify
your product
for manuals
and specific
product
information,
and then follow
the on-screen
instructions.)
1.5 MB or 7
MB
Yes Yes Stores
Management
Engine Code,
Settings,
Provisioning
Data and
iAMT third-
party data
store.
Management Engine
Code is programmed
at the factory. Code is
updated via Intel secure
firmware update utility.
Unique Provisioning Data
can be entered at
the factory or by
an administrator using
the Management Engine
(MEBx) setup utility.
The third-party data
store contents can be
populated by a remote
management console or
local applications that
have been registered by
an administrator to have
access to the space.
The Intel chipset is
configured to enforce
hardware protection
to block all direct
read-write access
to this area. An
Intel utility must be
used for updating
the firmware. Only
firmware updates
digitally signed by
Intel can be applied
using this utility.
Bluetooth®
flash (select
products only)
2 megabits No Yes Stores
Bluetooth
configuration
and
firmware.
Bluetooth flash is
programmed at the
factory. Tools for writing
data to this memory are
not publicly available but
can be obtained from the
silicon vendor.
A utility must be used
for writing data to this
memory and is made
available through
newer versions of
the driver whenever
the flash requires an
upgrade.
98 Chapter 11 Statement of memory volatility

HP Z Series Specifications

General

Brand	HP
Model	Z Series
Category	Desktop
Language	English