3.HARDWARE SETUP

3.5.2SDR DIMM Support

The three SDR DIMM sockets support 3.3Volt (power level) unbuffered Single Data Rate Synchronous Dynamic Random Access Memory (SDR SDRAM) of 64MB, 128MB, 256MB, 512MB, and 1GB to form a memory size between 64MB to 3GB. One side (with memory chips) of the DIMM takes up one row on the motherboard.

SDR DIMMs supports non-ECC (used in desktops/laptops) and are available in unbuffered (typically used in PCs) versions.

Install memory in any combination as follows:

DIMM Location

168-pin SDR DIMM

Total Memory

Socket 1 (Rows 0&1)

64MB, 128MB, 256MB, 512MB, 1GB

x1

 

 

 

Socket 2 (Rows 2&3)

64MB, 128MB, 256MB, 512MB, 1GB

x1

 

 

 

Socket 3 (Rows 4&5)

64MB, 128MB, 256MB, 512MB, 1GB

x1

 

 

 

 

Total System Memory (Max 3GB)

=

 

 

 

The 168-pin DIMM must be a 3.3V unbuffered SDR SDRAM. Look for two notches on each SDR DIMM:

1

88 Pins

 

 

 

 

 

 

A7A266-E

 

 

 

 

 

 

 

 

 

 

 

60 Pins

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20 Pins

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A7A266-E 168-Pin DIMM Sockets

 

 

 

 

 

 

 

 

Lock

 

168-Pin DIMM Notch Key Definitions (3.3V)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DRAM Key Position

Voltage Key Position

RFU

Unbuffered

5.0V

Reserved

Buffered

 

3.3V

.3 SETUPH/W

System Memory

ASUS A7A266-E User’s Manual

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