User Guide

36
A
A
X
X
4
4
S
S
G
G
W
W
L
L
A
A
N
N
O
O
n
n
l
l
i
i
n
n
e
e
M
M
a
a
n
n
u
u
a
a
l
l
M
M
a
a
x
x
i
i
m
m
u
u
m
m
t
t
h
h
e
e
p
p
e
e
r
r
f
f
o
o
r
r
m
m
a
a
n
n
c
c
e
e
o
o
f
f
D
D
u
u
a
a
l
l
C
C
h
h
a
a
n
n
n
n
e
e
l
l
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:
● Same DRAM technology (128Mb, 256Mb, or 512Mb)
● Same Density (128MB, 256MB, 512MB, etc.) ● Same DRAM bus width (x8 or x16)
● Matched DIMM configuration in each channel ● Both either single-sided or dual-sided
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 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.
Different
Bus Width
Different
Technology
Organization Density Composition Technology External
16Mx64 128MB 16Mx8 *8 pcs 128MB 1
16Mx64 128MB 16Mx16 *4 pcs 256MB 1
32Mx64 256MB 16Mx8 *16 pcs 128MB 2
32Mx64 256MB 32Mx8 *8 pcs 256MB 1
Different # of
DRAM Banks
Non-Matched
128MB DIMMs
Different
Technology
Non-Matched
256MB DIMMs