22 Technical Manual D2619 (RX/TX300 S5)
Main memory Features
● Can run with differently rated memory modules and use the settings of the
slowest memory module on both channels.
● The total physical memory available to the system is half of what is
populated.
Spare channel mode
Figure 5: Spare channel mode
In figure 5 you can see the slots that must be populated for a minimum config-
uration and for the first two upgrades.
C hannel AC hannel BC hannel C
CPU1
C hannel AC hannel BC hannel C
CPU1
C hannel AC hannel BC hannel C
CPU1
DIMM-2A
DIMM-1A
DIMM-2B
DIMM-1B
DIMM-2C
DIMM-1C
DIMM-3 A
DIMM-2A
DIMM-1A
DIMM-3 B
DIMM-2B
DIMM-1B
DIMM-3 C
DIMM-2C
DIMM-1C
DIMM-3 A
DIMM-3 B
DIMM-2B
DIMM-3 C
DIMM-2C
DIMM-1A
DIMM-1B
DIMM-1C
DIMM-3 A
DIMM-3 B
DIMM-3 C
Minimum Memory Configuration ( S pare Ch an nel Mode)
DIMM-2A
1st Upgrade
2nd U pgrade