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ASUS P4SDX motherboard user guide
1-13
1.9.3.1 SiS
®
Dual channel memory controller configuration
A. 2 DIMMs population:
2. 2 x 64 Bit Mode: DIMMs installed on different Channels.
Same size,
different type
B. 3 DIMMs population:
• Use only the following combinations to install DDR DIMMs. Otherwise, the
system may not work properly.
• DIMM modules are limited only to a total combination of 18 chip devices.
• PC1600 DDR is only supported in 400MHz FSB.
• Stacked memory DIMM models are not supported by this motherboard.
DIMM_A1 DIMM_B1
Channel 0 Channel 1
Different
size
DIMM_A2
Channel 0
Channel 1
DIMM_A1
DIMM_B1
DIMM_A2
DIMM_A1
DIMM_B1
Channel 0
Channel 1
DIMM_A2
DIMM_A1
DIMM_B1
Channel 0
Channel 1
1. 128 Bit Mode: Exactly the same size and type DIMMs on Channels 0 and 1.
1. 2 x 64 Bit Mode: DIMMs populated on different Channels
DIMM_A1
DIMM_A2
DIMM_B1
Channel 0
Channel 1
C. 4 DIMMs population:
1. 2 x 64 Bit Mode: DIMMs populated on different Channels
DIMM_A2
Channel 0
Channel 1
DIMM_A1
DIMM_B2
DIMM_B1
DIMM_A2
Channel 0
Channel 1
DIMM_A1
DIMM_B2
DIMM_B1
2. 128 Bit Mode: Exactly the same size and type DIMMs on Channels 0 and 1.
DIMM_A2
DIMM_B2
DIMM_A1 DIMM_B1
Channel 0
Channel 1
Channel 0
Channel 1
DIMM_A2 DIMM_B2
DIMM_A1 DIMM_B1 DIMM_A1
DIMM_B2
DIMM_A2
DIMM_B1
Channel 0
Channel 1
DIMM_A2
DIMM_A1
DIMM_B1
DIMM_B2
Channel 0
Channel 1
Channel 0
DIMM_A1
DIMM_B1
Channel 1
Refer to section “2.4.1 Chip Configuration” for BIOS setup details.
DIMM_A1 DIMM_B1
Channel 0
Channel 1