Memory Support And Installation; Memory Support; Memory Installation Sequence; General Memory Population Requirements - Supermicro X11DPG-QT User Manual

Super X11DPG-QT User's 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 X11DPG-QT supports up to 4TB of 3DS Load Reduced DIMM (3DS LRDIMM), 3DS
Registered DIMM (3DS RDIMM), or up to 2TB of Load Registered DIMM (LRDIMM), with
speeds of 2933*/2666/2400/2133/1866/1600/1333 MHz modules in 16 memory slots (*Notes
below). Populating the DDR4 memory module in 2DPC system configuration on this MBD
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.
Notes: 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. When installing memory modules, be sure to populate the first DIMM module on
the blue memory slot, which is the first memory slot of a memory channel, and then
populate the second DIMM in the black slot if 2DPC memory configuration is used. 3.
Memory speed is dependent on the type of processors used in your system. 4. Populat-
ing DDR4 memory modules in a two-DIMMs per-channel (2DPC) configuration on this
motherboard will affect memory bandwidth and performance. 5. Unbalanced memory
configuration is not recommended. 6. Support for 2933MHz memory is dependent on
the CPU SKU. 7. 16Gb-based memory modules are supported by 2nd Gen Intel Xeon
Scalable-SP processors only.

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 "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.
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