1. Installing Internal Optional Devices
Express5800/B120f User's Guide
53
Chapter 2 Preparations
•
Installation order depends on CPU configuration. See the table below.
Installation order in
1-CPU configuration
Installation order in
2-CPU configuration
CPU1-DIMM1
Installation not allowed
CPU1-DIMM1
Installation not allowed
CPU1-DIMM2
1
CPU1-DIMM2
1
CPU1-DIMM3
1
CPU1-DIMM3
1
CPU1-DIMM4
Installation not allowed
CPU1-DIMM4
Installation not allowed
CPU1-DIMM5
2
CPU1-DIMM5
3
CPU1-DIMM6
2
CPU1-DIMM6
3
–
–
CPU2-DIMM1
Installation not allowed
–
–
CPU2-DIMM2
2
–
–
CPU2-DIMM3
2
–
–
CPU2-DIMM4
Installation not allowed
–
–
CPU2-DIMM5
4
–
–
CPU2-DIMM6
4
Memory Lock Step cannot be configured in the following cases:
•
Memory Lock Step between memory channels of different memory controllers (CPU)
•
Memory Lock Step within the same memory channel
Notes on Configuring Lock Step
In Memory Lock Step configuration, [Memory RAS Mode] is changed from "Lock Step" to "Independent" in the
following cases:
•
When you additionally install DIMMs that unable to configure Memory Lock Step
•
When you remove DIMMs that takes down Memory Lock Step
"Lock Step" is not displayed in "CPUx_DIMMx Status xxxx MB (Lock Step)" in Memory Information of BIOS
SETUP menu.