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2. HARDWARE SETUP

2.4.2 DIMM Memory Installation

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. DIMM mod-

ules are longer and have different pin contact on each side and therefore have a

higher pin density. SIMM modules have the same pin contact on both sides.

A7V-VM

A7V-VM 168-Pin DIMM Sockets

The DIMMs must be 3.3V Unbuffered for this motherboard. 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

RFU

Buffered

The notches on the DIMM module 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 ask your retailer the correct DIMM type before pur-

chasing. This motherboard supports four clock signals.

Unbuffered

A7V-VM User's Manual

20 Pins

60 Pins

88 Pins

Voltage Key Position

Reserved

5.0V

3.3V

Lock