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Chapter 3: Maintenance and Component Installation
Memory Installation
Memory Support
The X11SCW-F supports up to 128GB of unbuffered (UDIMM) DDR4 (288-pin) ECC memory
(2-DIMM per channel) with speeds of up to 2666MHz in four memory slots. Refer to the tables
below for the recommended DIMM population order and additional memory information.
Note:
Check the Supermicro website for possible updates to memory support. Exercise
extreme caution when installing or removing memory modules to prevent any possible damage
to the DIMMs or slots.
1 CPU, 4-DIMM Slots
Number of DIMMs
Memory Population Sequence
1
DIMMB2
2
DIMMB2 / DIMMA2
3
(Unbalanced: Not
Recommended)
DIMMB2 / DIMMA2 / DIMMB1
4
DIMMB2 / DIMMA2 / DIMMB1 / DIMMA1
DIMM
Type
Ranks Per
DIMM and
Data Width
DIMM Capacity
(GB)
Speed (MT/s), Voltage (V),
Slot Per Channel (SPC),
and DIMM Per Channel
(DPC)
2 Slots Per Channel
DRAM Density
1DPC
2DPC
4GB
8GB
1.2V
1.2V
Unbuffered
DDR4 ECC
SR
16GB
(4x 4GB
DIMMs)
32GB
(4x 8GB
DIMMs)
2666
2666
DR
32GB
(4x 8GB
DIMMs)
64GB
(4x 16GB
DIMMs)
General Guidelines for Optimizing Memory Performance
•
The blue slots must be populated first.
•
Always use DDR4 memory of the same type, size, and speed.
•
Mixed DIMM speeds can be installed. However, all DIMMs will run at the speed of the
slowest DIMM.
•
The motherboard will support odd-numbered modules. However, a balanced memory
population is recommended to achieve optimal memory performance,