Dimm Installation Order - NEC Express5800 Series User Manual

Chapter 2 Preparations
1.9.2

DIMM installation order

This server's memory subsystem is divided into channels. Each processor supports 6 channels and each
channel supports 2 DIMM slots.
Slot number shows DIMM slot ID for spare replacement.
Please see the following chart for the location of the slot number.
The installation order in the 1CPU configuration is different from that in the 2CPU configuration.
・When CPU1 is mounted
Mounted
number
1 DIMM
2 DIMM 2
3 DIMM 1 2
4 DIMM 2
5 DIMM 1 2
6 DIMM 1 2
7 DIMM 1 2
8 DIMM 1 2
Note
See Memory RAS features supported by additional memory board in 1.11.3
Memory RAS Feature before using memory RAS feature.
CPU1 Slot number
3
3
3
3 6 7
3 6 7
3 6 7 7
3 4 6 7 8
3 4 5 6 7 8
Express5800/R120h-2E User's Guide
Note)
Installation of 5/7 memories leads to
the "Unbalanced, not recommended"
condition, and Information message
510 appears.
―――――――――――――――
510 - The installed number of DIMMs
on one or more processors results in
an unbalanced memory configuration
across memory controllers. This may
result in non-optimal memory
performance.
1. Installing Internal Optional Devices
69