2.5.2 Memory Configurations

The motherboard supports system memory of up to 12GB in a two-way interleaved configuration. As a rule, this configuration requires that you install identical DDR DIMMs (exactly the same type and size) in pairs. For example, if you installed a 512MB module into DDRA1, you must install the same type of 512MB module into DDRA2. The same rule applies to pairs DDRB1/DDRB2 and DDRC1/DDRC2.

The only exception to the above rule allows you to install one DIMM into DDRA1 socket (the socket closest to the ATX power connector). Installing a single DIMM into any other socket would not work.

The following table lists the DIMM socket pairs and the memory modules that you can install.

Memory configuration table

DIMM Socket

184-pin ECC DDR DIMM

 

Total Memory

DDRA1

SDRAM 128MB, 256MB, 512MB, 1GB, 2GB

x1

DDRA2

SDRAM 128MB, 256MB, 512MB, 1GB, 2GB

x1

DDRB1

SDRAM 128MB, 256MB, 512MB, 1GB, 2GB

x1

DDRB2

SDRAM 128MB, 256MB, 512MB, 1GB, 2GB

x1

DDRC1

SDRAM 128MB, 256MB, 512MB, 1GB, 2GB

x1

DDRC2

SDRAM 128MB, 256MB, 512MB, 1GB, 2GB

x1

Total System Memory (Max. 12GB)

=

 

The system chipset only supports PC2100/1600 registered ECC DIMMs. Make sure to use only the specified DIMM types for stable system operation.

Memory frequency/CPU FSB synchronization

CPU FSB

DDR DIMM Type

Memory Frequency

 

 

 

533 MHz

PC2100

266 MHz

 

 

 

400 MHz

PC1600

200 MHz

 

 

 

Make sure that the memory frequency matches the CPU FSB (Front Side Bus).

ASUS PR-DLS533 motherboard user guide

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