Memory Support And Installation - Supermicro X11DPU-XLL 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 4TB 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
modules in 16 slots. Populating the DDR4 memory module in 2DPC system confi guration on
this motherboard will affect memory bandwidth performance.
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.
3. Populating DDR4 memory modules in a two-DIMMs per-channel (2DPC) confi gura-
tion on this motherboard will affect memory bandwidth and performance.
Memory Installation Sequence
Memory modules for this motherboard 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.
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.
33
Chapter 2: Installation