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Main memory
– It is possible to mix memory modules with different clock rates. The lowest
clock rate will be applied to the system.
– Single and dual-rank memory modules can be mixed, quad-rank memory
modules have to be used exclusively.
– Mix of modules with different capacity is possible bank-wise (2x2) with Mirror
or Spare Mode.
– The assignment of the DIMM slots to the banks and channels is printed on
the system board.
– Install memory modules within a channel in descending order of capacity:
higher capacity in black slot, lower capacity in blue slot.
3.2.2
Modes of operation
Possible population in different modes:
Independent
Channel Mode
DIMM 1F
CPU 1
DIMM 2F
DIMM 1E
DIMM 2E
DIMM 2A
DIMM 1D
DIMM 1A
DIMM 2D
DIMM 2B
DIMM 1B
DIMM 2C
CPU 2
DIMM 1C
Legend:
required
required, if 2nd CPU is configured
Figure 3: Possible population in different modes
Independent Channel Mode
– Allows population of all channels in any order. Related to the channels (A-F)
DIMM1 must be populated first.
– Works with DIMMs of different clock rates and applies the lowest clock rate.
24
Mirrored
Channel Mode
* Mirror
DIMM 1F
CPU 1
DIMM 2F
DIMM 1E
*
DIMM 2E
*
DIMM 2A
DIMM 1D
DIMM 1A
DIMM 2D
DIMM 2B
*
DIMM 1B
*
DIMM 2C
CPU 2
DIMM 1C
optional, same type in bank per CPU
optional, any type
Technical Manual
Performance
Channel Mode
DIMM 1F
CPU 1
DIMM 2F
DIMM 1E
DIMM 2E
DIMM 2A
DIMM 1D
DIMM 1A
DIMM 2D
DIMM 2B
DIMM 1B
DIMM 2C
CPU 2
DIMM 1C
Spare
Channel Mode
* Spare
DIMM 1F
*
CPU 1
DIMM 2F
*
DIMM 1E
DIMM 2E
DIMM 2A
DIMM 1D
DIMM 1A
DIMM 2D
DIMM 2B
DIMM 1B
DIMM 2C
*
CPU 2
DIMM 1C
*
not usable
D2799 (TX200 S6)