2
Hardware Description
26
Integrated Memory Controller (IMC)
The
integrated
memory
controller
incorporated
into
each
E5
‐
2400
family
processor
supports
three
channels
of
DDR3,
each
channel
with
64
data
bits
and
8
ECC
bits.
The
CPM
supports
up
to
six
registered
VLP
RDIMMs
per
socket
(two
per
channel)
for
a
system
total
of
twelve
RDIMMs.
Table 6
lists
the
supported
RDIMM
memory
types
of
the
CPM
and
provides
the
required
specifications
for
the
modules.
The
integrated
memory
controller
supports
up
to
four
memory
modes,
but
the
CPM
uses
only
the
Independent
mode
(highest
performance)
in
which
RDIMMs
can
be
placed
in
any
of
the
three
channels
and
there
are
no
matching
requirements
for
rank
or
DIMM
speed
between
channels.
A
burst
‐
length
of
8
is
used,
and
the
memory
controller
is
configured
to
interleave
the
memory
map
across
the
three
channels.
The
IMC
provides
the
following
tools
to
support
memory
reliability
and
peak
operation:
•
SDDC
(Single
Device
Data
Correction)
algorithm
that
can
detect
and
correct
any
error
within
a
x4
device
in
independent
mode.
•
DRAM
thermal
management
either
by
DRAM
throttling
or
by
performing
a
2X
refresh
to
the
memory
channels.
Table 6. Supported Memory Types
Mem Rank x Data Width
Operating Voltage
DIMMs per Channel Memory per DIMM Speed (MT/s)
Registered DIMM (RDIMM) with ECC
Single rank x 8 bits
1.5 v
One or Two
1, 2, 4 GB
1066/1333 MHz
Single rank x 8 bits
LV - 1.35 v
Two
1, 2, 4 GB
1066 MHz
Dual rank x 8 bits
1.5 v
One or Two
2, 4, 8 GB
1066/1333 MHz
Dual rank x 8 bits
LV - 1.35 v
Two
2, 4, 8 GB
1066 MHz
Quad rank x 8 bits
1.5 v or LV - 1.35 v One or Two
4, 8, 16 GB
800 MHz
Single rank x 4 bits
1.5 v
One or Two
2, 4, 8 GB
1066/1333 MHz
Single rank x 4 bits
LV - 1.35 v
Two
2, 4, 8 GB
1066 MHz
Dual rank x 4 bits
1.5 v
One or Two
4, 8, 16 GB
1066/1333 MHz
Dual rank x 4 bits
LV - 1.35 v
Two
4, 8, 16 GB
1066 MHz
Quad rank x 4 bits
1.5 v or 1.35 v
One or Two
8, 16, 32 GB
800 MHz
Load Reduced DIMM (LRDIMM) with ECC
Quad rank x 8 bits
LV - 1.35 v
One
8, 16 GB
1066 MHz
Quad rank x 8 bits
LV - 1.35 v
Two
8, 16 GB
800 MHz
Quad rank x 8 bits
1.5 v
One
8, 16 GB
1066/1333 MHz
Quad rank x 8 bits
1.5 v
Two
8, 16 GB
1066 MHz
Quad rank x 4 bits
LV - 1.35 v
One
16, 32 GB
1066 MHz
Quad rank x 4 bits
LV - 1.35 v
Two
16, 32 GB
800 MHz
Quad rank x 4 bits
1.5 v
One
16, 32 GB
1066/1333 MHz
Quad rank x 4 bits
1.5 v
Two
16, 32 GB
1066 MHz
