16
Technical Manual
D2239 (TX150 S4)
Main memory
Features
3.2
Main memory
The system board supports up to 8 Gbyte main memory. 4 slots (2 memory
banks with 2 modules) are available for the main memory. Each memory bank
can be populated with 512 Mbyte, 1 Gbyte or 2 Gbyte unbuffered DDR2
memory modules.
Module population
Figure 2: Main memory
–
If the memory modules are populated in pairs, each pair must consist of
identical memory modules (2-way interleaved mode).
–
The module capacity between pairs can differ: pair 2A/2B can be populated
with two 512 Mbyte memory modules and pair 1A/1B with two 1 Gbyte
memory modules.
Following table shows the mandatory population order:
DIMM_1A
DIMM_2A
DIMM_1B
DIMM_2B
single
channel
populated
empty
empty
empty
empty
populated
empty
empty
empty
empty
populated
empty
empty
empty
empty
populated
dual channel
populated
empty
populated
empty
empty
populated
empty
populated
populated
populated
populated
populated
D I M M 1 A
D I M M 2 A
D I M M 2 B
D I M M 1 B
