D3030 (BX920 S2)
Technical Manual
25
Main memory
Mirrored Channel Mode
In this mode, channels A and B of CPU 1 and channels D and E of CPU 2 form
exact copies of each other.
●
Channel A and channel B of CPU1 must be fitted identically and channel D
and channel E of CPU2 must be fitted identically (channel C and F cannot
be used in Mirrored Channel Mode since the "counterpart" is missing).
●
Memory modules with different clock frequencies and different speed ratings
can be used within a channel, whereby the settings of the slowest memory
module are used for the channel.
●
In Mirrored Channel Mode, the total main memory available in the system is
half as large as the installed memory.
Figure 4: Fitting in Mirrored Channel Mode
CPU 1
CPU 2
DIMM 2A
DIMM 1A
DIMM 2B
DIMM 1F
empty
empty
empty
1.
2.
1.
2.
1.
1.
DIMM 1E
DIMM 1D
Front
Ch
a
nnel 2
Ch
a
nnel 1
Ch
a
nnel 0
DIMM 1B
DIMM 1C
DIMM 2C
Ch
a
nnel 0
Ch
a
nnel 1
Ch
a
nnel 2
S
lot 1
S
lot 0
S
lot 0
S
lot 0
S
lot 0
S
lot 1
S
lot 0
S
lot 0
S
lot 1
