Dual-Channel Symmetric Mode (Interleaved Mode) - Onlogic Axial AC101 Product Manual

"The symmetric zone starts at the lowest address in each channel and is contiguous until the
asymmetric zone begins or until the top address of the channel with the smaller capacity is reached.
In this mode, the system runs with one zone of dual-channel mode and one zone of single-channel
mode, simultaneously, across the whole memory array."
Source:
https://edc.intel.com/content/www/us/en/design/ipla/software-development-platforms/client/platforms/alder-lake-desktop/1
2th-generation-intel-core-processors-datasheet-volume-1-of-2/system-memory-controller-organization-mode-ddr4-5-only/

3.6.1.3 - Dual-Channel Symmetric Mode (Interleaved Mode)

Dual-Channel Symmetric mode is fully interleaved and provides the maximum performance.
The Axial AC101 will default to Dual-Channel Symmetric mode when both Channel A and Channel B
DIMM connectors are populated in any order, with the total amount of memory in each channel being
the same.
When both channels are populated with the same memory capacity and the boundary between the
dual channel zone and the single channel zone is the top of memory, IMC operates completely in
Dual-Channel Symmetric mode.
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