Memory Support And Installation - Supermicro X11DAi-N User Manual

X11DAi-N User's Manual

2.4 Memory Support and Installation

Notes: 1)Check the Supermicro website for recommended memory modules. 2)Exer-
cise extreme care when installing or removing DIMM modules to prevent any damage.
Memory Support
The motherboard supports up to 4TB of 3DS LRDIMM (3DS Load Reduced DIMM), LRDIMM,
NV-DIMM (Non-Volatile DIMM), and RDIMM (Registered DIMM), DDR4 (288-pin), ECC
2933*/2666/2400/2133 MHz memory in 16 slots (*Note 1 below). This motherboard also
supports up to 5TB memory with DCPMM modules installed based on the DCPMM population
table on page 38. The black DIMM slots are reserved for DCPMM support. (Please refer
to Section 1-10 in Chapter 1 for more information on DCPMM memory support.).
Note: 1. Support for 2933 MHz memory is dependent on the CPU SKU. 2. Populat-
ing DDR4 memory modules in a two-DIMMs per-channel (2DPC) configuration on this
motherboard will affect memory bandwidth and performance. 3. 16Gb-based memory
modules are supported by 2nd Gen Intel Xeon Scalable-SP processors only.
Memory Installation Sequence
Memory modules for the X11 UP/DP/MP motherboards are populated using the "Fill First"
method. The blue memory slot of each channel is considered the "first DIMM module" of
the channel, and the black slot, the second module of the channel. When installing memory
modules, be sure to populate the blue memory slots first and then populate the black slots.
To maximize memory capacity and performance, please populate all DIMM slots on the
motherboard, including all blue slots and black slots.
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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