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18 ASUS MEL-M User’s Manual
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.
MEL-M 168-Pin DIMM Sockets
Lock
FRONT
20 Pins 60 Pins 88 Pins
010101
R
MEL-M
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 ask your retailer the correct DIMM type before purchas-
ing. This motherboard supports four clock signals.
III. HARDWARE SETUP
System Memory
III. H/W SETUP