Asus PR-DLS533 2.5.2 Memory Configurations, Memory configuration table, Memory frequency/CPU FSB synchronization, CPU FSB, DDR DIMM Type, Memory Frequency

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 2-9