Asus ME-99B ME-99B User Manual - Page 23

DIMM Memory Installation

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3. HARDWARE SETUP 3.5.3 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. 01 3. H/W SETUP System Memory 20 Pins 60 Pins 88 Pins ME-99B ® Lock ME-99B 168-Pin DIMM Memory 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 RFU Unbuffered Buffered Voltage Key Position 5.0V Reserved 3.3V 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 purchasing. This motherboard supports four clock signals. ASUS ME-99B User's Manual 23

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ASUS ME-99B User’s Manual
23
3. HARDWARE SETUP
System Memory
3. H/W SETUP
3.5.3
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.
ME-99B 168-Pin DIMM Memory Sockets
20 Pins
60 Pins
88 Pins
Lock
0
1
®
ME-99B
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 pur-
chasing. This motherboard supports four clock signals.