Chapter 2: Server Installation
19
Memory Population Sequence
Blue slots versus black slots:
Install the first DIMM in the blue memory slot, which is the
first of a memory channel. Then, if using two DIMMs per channel, install the second DIMM
in the black slot.
When installing memory modules, the DIMM slots should be populated in the following order:
DIMMB2, DIMMA2, DIMMB1, DIMMA1.
•
Always use DDR4 DIMM modules 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 (1 or 3 modules installed). However,
for best memory performance, install DIMM modules in pairs to activate memory interleav-
ing.
The following memory population diagram is for illustrative purposes; your motherboard may
look different.
DIMMB2 (Blue Slot)
DIMMA2 (Blue Slot)
Towards the edge of the motherboard
Towards the CPU
DIMMA1
DIMMB1
