Memory Support And Installation; Memory Support - Supermicro X11DDW-L/NT User Manual

2.4 Memory Support and Installation

Note: Check the Supermicro website for recommended memory modules.
Important: Exercise extreme care when installing or removing DIMM modules to pre-
vent any damage.

Memory Support

The X11DDW-L/NT supports up to 1536GB of Load Reduced DIMM (LRDIMM), Registered
DIMM (RDIMM), and Non-Volatile DIMM (NV-DIMM) DDR4 (288-pin) ECC 2666MT/s modules
in 12 slots. Populating these DIMM modules with a pair of memory modules of the same type
and size will result in interleaved memory, which will improve memory performance.
Notes: 1. Be sure to use memory modules of the same type and speed on the moth-
erboard. Mixing of memory modules of different types and speeds is not allowed.
2. When installing memory modules, be sure to populate the first DIMM module on
the blue memory slot, which is the first memory slot of a memory channel, and then
populate the second DIMM in the black slot if 2DPC memory configuration is used.
3. Using unbalanced memory topology by populating two DIMMs in one channel while
populating one DIMM in another channel will result in reduced memory performance.
DDR4 Memory Support for the Intel Xeon 81/xx/61xx/51xx/41xx/31xx Processor Platform
Ranks
Per
Type DIMM
and Data
Width
RDIMM SRx4
RDIMM SRx8
RDIMM DRx8
RDIMM DRx4
QRX4
RDIMM 3Ds
8RX4
LRDIMM QRx4
QRX4
LRDIMM 3Ds
8Rx4
DDR4 Memory Support for the Intel Xeon 81/xx/61xx/51xx/41xx/31xx Processor Platform
Ranks
Per
Type DIMM
and Data
Width
RDIMM SRx4
RDIMM SRx8
RDIMM DRx8
RDIMM DRx4
QRX4
RDIMM 3Ds
8RX4
LRDIMM QRx4
QRX4
LRDIMM 3Ds
8Rx4
Speed (MT/s); Voltage (V); Slots per Channel (SPC) and DIMMs per Channel (DPC)
DIMM Capacity
(GB)
1DPC (1-DIMM per Channel)
4 Gb 8 Gb 1.2 V
8 GB 16 GB 2666
4 GB 8 GB 2666
8 GB 16 GB 2666
16 GB 32 GB 2666
N/A 2H-64GB 2666
N/A 4H-128GB 2666
32 GB 64 GB 2666
N/A 2H-64GB 2666
N/A 4H-128 GB 2666
Speed (MT/s); Voltage (V); Slots per Channel (SPC) and DIMMs per Channel (DPC)
DIMM Capacity
(GB)
4 Gb 8 Gb
8 GB 16 GB
4 GB 8 GB
8 GB 16 GB
16 GB 32 GB
N/A 2H-64GB
N/A 4H-128GB
32 GB 64 GB
N/A 2H-64GB
N/A 4H-128 GB
33
Chapter 2: Installation
2 Slots per Channel
2DPC (2-DIMM per Channel)
1.2 V
2666
2666
2666
2666
2666
2666
2666
2666
2666
1 Slot per Channel
1DPC (1-DIMM per Channel)
1.2 V
2666
2666
2666
2666
2666
2666
2666
2666
2666