Asus P3B-F 3.5.2DIMM Memory Installation, H/W, P3B-F 168-PinDIMM Memory Sockets

System	H/W .3
Memory	SETUP

3.HARDWARE SETUP

3.5.2DIMM 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. 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.

Lock

88 Pins

F-P3B

60 Pins

20 Pins

P3B-F 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)

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 per DIMM.

22 ASUS P3B-F User’s Manual