Iii. installation – Asus P2L97-DS User Manual

Page 20

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ASUS P2L97-DS User’s Manual

System Memory

III. INST

ALLA

TION

III. INSTALLATION

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 as shown. DIMM
modules are longer and have different pin contact on each side and therefore have a
higher pin density. SDRAM DIMM modules have a different pin contact on each
side and therefore have a higher pin density.

Lock

168-Pin DIMM Memory Sockets

88 Pins

60 Pins

20 Pins

(FRONT)

R

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

Voltage Key Position

Unbuffered

RFU

Buffered

Reserved

3.3V

5.0V

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 tell your retailer the correct DIMM type before purchas-
ing. This motherboard supports four clock signals.

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