Memory Installation; Memory Support; General Guidelines For Optimizing Memory Performance - Supermicro SuperServer 5019C-WR User Manual

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.
Number of DIMMs
1
2
3
(Unbalanced: Not
Recommended)
4
Ranks Per
DIMM
DIMM and
Type
Data Width
SR
Unbuffered
DDR4 ECC
DR

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,
Chapter 3: Maintenance and Component Installation
1 CPU, 4-DIMM Slots
Memory Population Sequence
DIMMB2
DIMMB2 / DIMMA2
DIMMB2 / DIMMA2 / DIMMB1
DIMMB2 / DIMMA2 / DIMMB1 / DIMMA1
DIMM Capacity
(GB)
DRAM Density
4GB 8GB
16GB 32GB
(4x 4GB (4x 8GB
DIMMs) DIMMs)
32GB 64GB
(4x 8GB (4x 16GB
DIMMs) DIMMs)
29
Speed (MT/s), Voltage (V),
Slot Per Channel (SPC),
and DIMM Per Channel
(DPC)
2 Slots Per Channel
1DPC 2DPC
1.2V 1.2V
2666 2666