Intel SE7221BA1 Product Specification - Page 18

Supported DIMM Configurations, Memory Configurations - e memory

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Functional Architecture Intel® Entry Server Board SE7221BA1-E TPS • Regardless of the physical memory installed, there will always 64KB base memory and 8MB system memory occupied by system memory allocation, the left part will be accounted as extended memory. The memory amount showed on post is extended memory. Supported DIMM Configurations Table 1. Supported Memory Configurations DIMM Capacity SDRAM Density SDRAM Organization Configuration Front-side/Back-side Number of SDRAM Devices 128 MB SS 256 MB 16 M x 16/empty 4 256 MB SS 256 MB 32 M x 8/empty 8 256 MB SS 512 MB 32 M x 16/empty 4 512 MB DS 256 MB 32 M x 8/32 M x 8 16 512 MB SS 512 MB 64 M x 8/empty 8 512 MB SS 1 GB 64 M x 16/empty 4 1024 MB DS 512 MB 64 M x 8/64 M x 8 16 1024 MB SS 1 GB 128 M x 8/empty 8 2048 MB DS 1 GB 128 M x 8/128 M x 8 16 Note: In the second column, "DS" refers to double-sided memory modules (containing two rows of SDRAM) and "SS" refers to single-sided memory modules (containing one row of SDRAM). 3.2.2 Memory Configurations The Intel® E7221MC GMCH supports two types of memory organization: • Dual channel (Interleaved) mode. This mode offers the highest throughput for real world applications. Dual channel mode is enabled when the installed memory capacities of both DIMM channels are equal. Technology and device width can vary from one channel to the other but the installed memory capacity for each channel must be equal. If different speed DIMMs are used between channels, the slowest memory timing will be used. • Single channel (Asymmetric) mode. This mode is equivalent to single channel bandwidth operation for real world applications. This mode is used when only a single DIMM is installed or the memory capacities are unequal. Technology and device width can vary from one channel to the other. If different speed DIMMs are used between channels, the slowest memory timing will be used. NOTE The DIMM0 sockets of both channels are blue. The DIMM1 sockets of both channels are black. 8 Revision 1.5

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Functional Architecture
Intel® Entry Server Board SE7221BA1-E TPS
8
Revision 1.5
•
Regardless of the physical memory installed, there will always 64KB base memory and
8MB system memory occupied by system memory allocation, the left part will be
accounted as extended memory. The memory amount showed on post is extended
memory.
Supported DIMM Configurations
Table 1.
Supported Memory Configurations
DIMM
Capacity
Configuration
SDRAM Density
SDRAM Organization
Front-side/Back-side
Number of SDRAM
Devices
128 MB
SS
256 MB
16 M x 16/empty
4
256 MB
SS
256 MB
32 M x 8/empty
8
256 MB
SS
512 MB
32 M x 16/empty
4
512 MB
DS
256 MB
32 M x 8/32 M x 8
16
512 MB
SS
512 MB
64 M x 8/empty
8
512 MB
SS
1 GB
64 M x 16/empty
4
1024 MB
DS
512 MB
64 M x 8/64 M x 8
16
1024 MB
SS
1 GB
128 M x 8/empty
8
2048 MB
DS
1 GB
128 M x 8/128 M x 8
16
Note
: In the second column, “DS” refers to double-sided memory modules (containing two rows of SDRAM) and “SS”
refers to single-sided memory modules (containing one row of SDRAM).
3.2.2
Memory Configurations
The Intel® E7221MC GMCH supports two types of memory organization:
•
Dual channel (Interleaved) mode.
This mode offers the highest throughput for real
world applications.
Dual channel mode is enabled when the installed memory capacities
of both DIMM channels are equal.
Technology and device width can vary from one
channel to the other but the installed memory capacity for each channel must be equal.
If different speed DIMMs are used between channels, the slowest memory timing will be
used.
•
Single channel (Asymmetric) mode.
This mode is equivalent to single channel
bandwidth operation for real world applications.
This mode is used when only a single
DIMM is installed or the memory capacities are unequal.
Technology and device width
can vary from one channel to the other.
If different speed DIMMs are used between
channels, the slowest memory timing will be used.
NOTE
The DIMM0 sockets of both channels are blue.
The DIMM1 sockets of both channels are black.