Memory Support And Installation; Memory Support; Memory Installation Sequence; General Memory Population Requirements - Supermicro X11QPH+ 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 motherboard supports up to 12TB of 3DS LRDIMM/LRDIMM/3DS RDIMM/RDIMM
DDR4 (288-pin) 2933*/266/2400/2133 MHz modules in 48 slots This motherboard also
supports up to 18TB memory with DCPMM modules installed based on the DCPMM
population table on page 38.
Notes: 1. 2933 MHz memory is supported by 2nd Gen Intel Xeon Scablable-SP
(82xx/62xx series) processors only. 2. DCPMM memory is supported by
2nd Gen Intel Xeon Scablable-SP (82xx/62xx/52xx/42xx series) 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 "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