Asus A7V133 User Manual download pdf (Page 26)

ASUS A7V133 User’s Manual

3. HARDWARE SETUP

3. H/W SETUP

System Memory

3.5.2 Memory Installation

WARNING! Make sure that you unplug your power supply when adding or

removing memory modules or other system components. Failure to do so may

cause severe damage to both your motherboard and expansion cards (see 3.3

Hardware Setup Procedure for more information).

Insert the module(s) as shown. Because the number of pins are different on either

side of the breaks, the module will only fit in the orientation shown. DRAM SIMM

modules have the same pin contacts on both sides. SDRAM DIMMs have different

pin contacts on each side and therefore have a higher pin density.

A7V133 168-Pin DIMM Sockets

20 Pins

60 Pins

88 Pins

0 1

A7V133

The DIMMs must be 3.3Volt unbuffered SDRAMs. To determine the DIMM type,

check the notches on the DIMMs (see figure below).

168-Pin DIMM Notch Key Definitions (3.3V)

DRAM Key Position

Voltage Key Position

Unbuffered

RFU

Buffered

Reserved

3.3V

5.0V

The notches on the DIMM will shift between left, center, or right to identify the type

and also to prevent the wrong type from being inserted into the DIMM slot on the

motherboard. You must tell your retailer the correct DIMM type before purchasing.

This motherboard supports four clock signals per DIMM.

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Asus A7V133 User Manual Page 26