AC82G41SLGQ3 Datasheet, PDF (528/604 Pages) Intel Corporation – Intel® 4 Series Chipset Family

Functional Description
13.2.1.2.2 Dual Channel Asymmetric Mode with Intel^® Flex Memory Mode Enabled
In this addressing mode the lowest DRAM memory is mapped to dual channel operation
and the top most DRAM memory is mapped to single channel operation. In this mode
the system can run at one zone of dual channel mode and one zone of single channel
mode simultaneously across the whole memory array.
This mode is used when Intel^® Flex Memory Mode is enabled and both Channel A and
Channel B DIMMs are populated in any order with the total amount of memory in each
channel being different.
Table 31 is a sample dual channel asymmetric memory configuration showing the rank
organization with Intel^® Flex Memory Mode Enabled.
Table 31.
Sample System Memory Dual Channel Asymmetric Organization Mode with
Intel^® Flex Memory Mode Enabled
Rank
Channel 0
population
Cumulative top
address in
Channel 0
Channel 1
population
Cumulative top
address in
Channel 1
Rank 3
Rank 2
Rank 1
Rank 0
0 MB
0 MB
512 MB
512 MB
2048 MB
2048 MB
2048 MB
1024 MB
0 MB
256 MB
512 MB
512 MB
2304 MB
2304 MB
2048 MB
1024 MB
13.2.1.2.3 Dual Channel Asymmetric Mode with Intel^® Flex Memory Mode Disabled
(Stacked Mode)
In this addressing mode addresses start in channel 0 and stay there until the end of the
highest rank in channel 0, and then addresses continue from the bottom of channel 1
to the top.
This mode is used when Intel^® Flex Memory Mode is disabled and both Channel A and
Channel B DIMMs are populated in any order with the total amount of memory in each
channel being different.
Table 32 is a sample dual channel asymmetric memory configuration showing the rank
organization with Intel^® Flex Memory Mode Disabled.
Table 32.
Sample System Memory Dual Channel Asymmetric Organization Mode with
Intel^® Flex Memory Mode Disabled
Rank
Channel 0
population
Cumulative top
address in
Channel 0
Channel 1
population
Cumulative top
address in
Channel 1
Rank 3
Rank 2
Rank 1
Rank 0
0 MB
256 MB
512 MB
512 MB
1280 MB
1280 MB
1024 MB
512 MB
0 MB
0 MB
512 MB
512 MB
2304 MB
2304 MB
2304 MB
1792 MB
528
Datasheet