D3030 (BX920 S2)
Technical Manual
23
Main memory
Figure 3: Main memory operating modes
I
Spare channel mode is installed the same as performance channel
mode.
Independent Channel Mode
This mode allows the memory modules to be arranged in any order in each
channel. The channels do not have to be populated identically.
●
You can use memory modules with different speed ratings within a channel,
whereby the settings of the slowest memory module are used for each
channel.
●
All channels work with the fastest common frequency.
●
All timings except for the clock frequency can vary between the channels.
●
Always start by populating the main memory at CPU 1.
●
If CPU 2 is installed, the following applies:
–
For CPU 2, there must be at least one DIMM module (DIMM 1D)
installed.
–
The DIMM slots must be fitted in the following sequence:
CPU 2
CPU 1
DIMM 1F
DIMM 1D
DIMM 1E
DIMM 2A
DIMM 2B
DIMM 2C
DIMM 1B
DIMM 1C
DIMM 1A
CPU 2
CPU 1
DIMM 1F
DIMM 1D
DIMM 1E
DIMM 2A
DIMM 2B
DIMM 2C
DIMM 1B
DIMM 1C
DIMM 1A
Independent
Ch
a
nnel Mode
Mirrored
Ch
a
nnel Mode
Perform
a
nce
Ch
a
nnel Mode
re
qu
ired
re
qu
ired, if 2nd CPU i
s
config
u
red
option
a
l,
sa
me type in
ba
nk per CPU
option
a
l,
a
ny type
not
us
ed
CPU 2
CPU 1
DIMM 1F
DIMM 1D
DIMM 1E
DIMM 2A
DIMM 2B
DIMM 2C
DIMM 1B
DIMM 1C
DIMM 1A
