Memory Support And Installation - 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 3TB of 3DS Load Reduced DIMM (3DS LRDIMM),
Load Reduced DIMM (LRDIMM), 3DS Registered DIMM (3DS RDIMM), Registered DIMM
(RDIMM), Non-Volatile DIMM (NV-DIMM) DDR4(288-pin) ECC 2933*/2666/2400/2133 MHz
memory in 12 memory slots. This motherboard also supports up to 4TB memory with DCPMM
modules installed based on the DCPMM population table on page 41.
Note: 1. Support for 2933 MHz memory is dependent on the CPU SKU 2. 16Gb-based
memory modules are supported by 2nd Gen Intel Xeon Scalable-SP processors only.
General Memory Population Requirements
1. Be sure to use the memory modules of the same type and speed on the motherboard.
Mixing of memory modules of different types and speeds is not allowed.
2. Using unbalanced memory topology such as populating two DIMMs in one channel while
populating one DIMM in another channel on the same motherboard will result in reduced
memory performance.
3. Populating memory slots with a pair of DIMM modules of the same type and size will
result in interleaved memory, which will improve memory performance.
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Chapter 2: Installation