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Dual Channel memory configuration provides higher performance than single channel configuration. To get the highest
Dual Channel memory configuration provides higher performance than single channel configuration. To get the highest
performance of Dual Channel, the DIMM modules you're using must meet the following conditions:
performance of Dual Channel, the DIMM modules you're using must meet the following conditions:
Same DRAM technology (128Mb, 256Mb, or 512Mb)
Same DRAM technology (128Mb, 256Mb, or 512Mb)
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Same Density (128MB, 256MB, 512MB, etc.)
Same Density (128MB, 256MB, 512MB, etc.)
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Matched DIMM configuration in each channel
Matched DIMM configuration in each channel
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Note: Memory interface speed will be set to the lowest speed of memory populated.
Note: Memory interface speed will be set to the lowest speed of memory populated.
Optimize performance for dual channel is obtained with matched DIMM population. Table below shows DIMMs with same
Optimize performance for dual channel is obtained with matched DIMM population. Table below shows DIMMs with same
Organization and Density, but are non-matching as bus width, technology and/or external banks are different. Mixing these
Organization and Density, but are non-matching as bus width, technology and/or external banks are different. Mixing these
DIMMs will put platform into single channel mode.
DIMMs will put platform into single channel mode.
Organization
Non-Matched
16Mx64
128MB DIMMs
16Mx64
32Mx64
Non-Matched
32Mx64
256MB DIMMs
o
o
r
r
m
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a
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n
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c
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o
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C
C
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o
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D
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C
C
Density
128MB
128MB
256MB
256MB
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h
a
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n
n
n
n
e
e
l
l
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h
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a
n
n
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l
Same DRAM bus width (x8 or x16)
Same DRAM bus width (x8 or x16)
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Both either single-sided or dual-sided
Both either single-sided or dual-sided
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Different
Different
Bus Width
Technology
Composition
Technology
16Mx8 *8 pcs
128MB
16Mx16 *4 pcs
256MB
16Mx8 *16 pcs
128MB
32Mx8 *8 pcs
256MB
Different
Technology
32
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External
1
1
2
1
Different # of
DRAM Banks
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