Dimm Memory Installation - Asus P2B-VM User Manual

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. SIMM modules have the same pin contact on both sides.
20 Pins 60 Pins 88 Pins
R
Lock
P2B-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 Voltage Key Position
Reserved
RFU Unbuffered
5.0V
3.3V
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 tell your retailer the correct DIMM type before purchas-
ing. This motherboard supports four clock signals.
18 ASUS P2B-VM User's Manual