Asus P4P800 User Manual download pdf (Page 36)

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Chapter 2: Hardware information

2.5 System memory

2.5.1 Overview

The motherboard comes with four Double Data Rate (DDR) Dual Inline

Memory Module (DIMM) sockets. These sockets support up to 4GB

system memory using 184-pin unbuffered non-ECC PC3200/2700/PC2100

DDR DIMMs and allow up to 6.4 GB/s data transfer rate.

The following figure illustrates the location of the DDR DIMM sockets.

Notes on DDR technology

The DDR SDRAM technology evolved from the mainstream PC66, PC100,

PC133 memory known as Single Data Rate (SDR) SDRAM. DDR memory

however, has the ability to perform two data operations in one clock cycle,

thus providing twice the throughput of SDR memory.

A DDR DIMM has the same physical dimensions as an SDR DIMM, but it

has a 184-pin footprint compared to the 168-pin of the SDR DIMM. Also, a

DDR DIMM is single notched while an SDR DIMM is double notched.

Therefore, a DDR DIMM is not backward compatible with SDR, and should

be installed only in a socket specially designed for DDR DIMMs.

P4P800

P4P800 184-Pin DDR DIMM Sockets

80 Pins104 Pins

DIMM_A

DIMM_B

1 ... 35 36 37 ... 142

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Asus P4P800 User Manual Page 36