III. INSTALLATION

DIMM Memory Installation Procedures

Insert the module(s) as shown. Because the number of pins is different on either side of the breaks, the module will only fit in the orientation as 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.

Pins 88Pins 60 Pins 20

Lock

P2B-D2 168-Pin DIMM Memory Sockets

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)

System Memory

III. INSTALLATION

DRAM Key Position

Voltage Key Position

RFU

Unbuffered

5.0V

Reserved

Buffered

 

3.3V

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.

ASUS P2B-D2 User’s Manual

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