Memory Support And Installation; Memory Support - Supermicro X11DDW-L 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 3DS LRDIMM/RDIMM DDR4 ECC
2666/2400/2133 MHz memory in 12 memory slots. Populating these DIMM modules with a
pair of memory modules of the same type and size will result in interlved 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. 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 1-Slot Per-Channel Confi guration)
Ranks
Per
Type DIMM
and Data
Width
RDIMM SRx4
RDIMM SRx8
RDIMM DRx8
RDIMM DRx4 16 GB
RDIMM 3Ds QRX4
RDIMM 3Ds 8RX4
LRDIMM QRx4 32 GB
QRX4
LRDIMM 3Ds
8Rx4
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
32 GB
N/A 2H-64GB
N/A 4H-128GB
64 GB
N/A 2H-64GB
N/A 4H-128 GB
1 Slot per Channel
1DPC (1-DIMM per Channel)
1.2 V
2666
2666
2666
2666
2666
2666
2666
2666
2666
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Chapter 2: Installation