Asus P4B266-M Guide de l'utilisateur télécharger pdf (Page 30)

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Chapter 2: Hardware information

2.5 System memory

2.5.1 Overview

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

Memory Module (DIMM) sockets. These sockets support up to 2GB

system memory using 184-pin unbuffered ECC or non-ECC PC2100/1600

DIMMs.

A DDR DIMM is keyed with a notch so that it fits in only one direction.

DO NOT force a DIMM into a socket to avoid damaging the DIMM.

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. For example, a

200MHz DDR DIMM will support a 100MHz memory bus, and a 266MHz

DDR DIMM will support a 133MHz memory bus.

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

has a 184-pin footprint compared to the 164-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.

P4B266-M

P4B266-M 184-Pin DDR DIMM Sockets

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104 Pins

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Asus P4B266-M Guide de l'utilisateur Page 30