Reference Guide

Item
Non-
Volatile or
Volatile
Quantity
Reference
Designator
Size
Type (e.g.
Flash PROM,
EEPROM)
Can user programs
or operating
system write data
to it during normal
operation?
Purpose?
(e.g. boot
code)
How is
data input
to this
memory?
How is this
memory
write
protected?
How is the memory
cleared?
DRAM to
Flash
from DRAM to
flash
Internal USB
Key
Non-
Volatile
Up to 1
INTERNAL
_USB1
Varies
(not
factory
installed)
Flash
Yes
General
purpose USB
key drive
USB
interface
via PCH.
Accessed
via system
OS
No write
protect
Can be cleared in
system OS
CPU
Volatile
1 or 2
CPU1 /
CPU2
Various
Cache +
registers
Yes
Processor
cache +
registers
Various
Various
Remove A/C
iDRAC DDR
Volatile
1
U_IDRAC9
_DRAM1
512 MB
DRAM
No
iDRAC local
memory
iDRAC
Firmware
No write
protect
Remove A/C
iDRAC
Volatile
1
U_IDRAC
For CPU:
128 KB +
Registers
Co-proc:
64 Kb +
Registers
Cache +
registers
No
Processor
cache +
registers
iDRAC
Firmware
No write
protect
Remove A/C
PIROM
Non-
Volatile
1 or 2
CPU1 /
CPU2
256 Bytes
EEPROM
No
Processor info
+ scratchpad
SMBus
interface to
iDRAC
128 bytes
protected by
Intel/128
bytes not
protected
User cannot clear.