Memory Support And Installation; Memory Support; Memory Installation Sequence; General Memory Population Requirements - Supermicro X11DPI-N-O User Manual

2.4 Memory Support and Installation

Notes: Check the Supermicro website for recommended memory modules. Exercise
extreme care when installing or removing DIMM modules to prevent any damage.

Memory Support

The motherboard supports up to 2TB 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 2666/2400/2133 MHz memory modules
in 16 slots. The black DIMM slots are reserved for future NVDIMM support. Populating the
DDR4 memory module in 2DPC system confi guration on this motherboard will affect memory
bandwidth performance. 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.

Memory Installation Sequence

Memory modules for this motherboards are populated using the "Fill First" method. The blue
memory slot of each channel is considered the "fi rst 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 fi rst and then populate the black slots. To maximize memory
capacity, 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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Chapter 2: Installation