Kontron KT965 Series - Manual (Page 17)

KT965 Family
KTD-00699-S Public User Manual Date: 2010-04-15 Page 17 of 90
Flex mode.
This mode provides the most flexible performance characteristics. The bottommost DRAM
memory (the memory that is lowest within the system memory map) is mapped to dual channel operation;
the topmost DRAM memory (the memory that is nearest to the 8 GB address space limit), if any, is mapped
to single channel operation. Flex mode results in multiple zones of dual and single channel operation across
the whole of DRAM memory. To use flex mode, it is necessary to populate both channels.
**IMPORTANT NOTE:
Regardless of the memory configuration used (dual channel, single channel, or flex mode), DDR2
SLOT 1 must always be populated.
The below tables shows examples of possible Memory slot configurations for the support of the various
Memory modes.
Dual Channel (Interleaved) Mode Configurations
Channel A Channel B
DDR2 DIMM 0 (SLOT 1) DDR2 DIMM 1 (SLOT 2) DDR2 DIMM 0 (SLOT 3) DDR2 DIMM 1 (SLOT 4)
1 GB 1 GB
512 MB 512 MB 1 GB
512 MB 1 GB 512 MB 1 GB
In these examples the combined capacity of the two DIMMs in Channel A equals the combined capacity of
the two DIMMs in Channel B.
Single Channel (Asymmetric) Mode Configurations
Channel A Channel B
DDR2 DIMM 0 (SLOT 1) DDR2 DIMM 1 (SLOT 2) DDR2 DIMM 0 (SLOT 3) DDR2 DIMM 1 (SLOT 4)
1 GB
512 MB 1GB 1GB
In these examples the combined capacity of the two DIMMs in Channel A does not equal the capacity of the
DIMMs in Channel B.
Flex Mode Configurations
Channel A Channel B
DDR2 DIMM 0 (SLOT 1) DDR2 DIMM 1 (SLOT 2) DDR2 DIMM 0 (SLOT 3) DDR2 DIMM 1 (SLOT 4)
512 MB 1 GB
The 512 MB DIMM in the Channel A, DIMM 0 socket and the lower 512 MB of the DIMM in the Channel B,
DIMM 0 socket operate together in dual channel mode. The remaining (upper) 512 MB of the DIMM in
Channel B operates in single channel mode.
Channel A, DDR2 DIMM 0 (SLOT 1)**
Channel A, DDR2 DIMM 1 (SLOT 2)
Channel B, DDR2 DIMM 0 (SLOT 3)
Channel B, DDR2 DIMM 1 (SLOT 4)