1.7System memory

1.7.1Overview

The motherboard comes with two 184-pin Double Data Rate (DDR) Dual Inline Memory Modules (DIMM) sockets. The following figure illustrates the location of the sockets:

DIMM1

DIMM2

P5P800S

P5P800S 184-pin DDR DIMM sockets

1.7.2Memory Configurations

You may install 128 MB, 256 MB, 512 MB and 1 GB unbuffered non-ECC DDR DIMMs into the DIMM sockets using the memory configurations in this section.

1.For optimum compatibility, it is recommended that you obtain memory modules from the same vendor. See the DDR400 Qualified Vendor List (QVL) on page 1-16.

2.Make sure that the memory frequency matches the CPU FSB (Front Side Bus). Refer to the Memory frequency/CPU FSB synchronization table below.

3.Always install DIMMs with the same CAS Latency.

4.Double-sided DDR DIMMs with x 1 6 (data bus=16bit) memory chips are not supported due to chipset limitation.

Memory frequency/CPU FSB synchronization

This motherboard supports different memory frequencies depending on the CPU FSB (Front Side Bus) and the type of DDR DIMM.

CP U FSB

DDR DIMM Type

Memory Frequency

 

 

 

 

 

 

800 MHz

PC3200/PC2700/PC2100

400/320*/266 MHz

 

533 MHz

PC2700/PC2100

333/266 MHz

 

 

 

 

 

 

 

 

 

 

 

*When using 800 MHz FSB CPU, PC2700 DDR DIMMs run only at 320MHz (not 333MHz) due to chipset limitation.

ASUS P5P800S

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