Asus P3W P3W User Manual - Page 25

DIMM Installation

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3. HARDWARE SETUP 3.5.2 DIMM 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. DIMMs are longer and have different pin contact on each side and therefore have a higher pin density. SIMMs have the same pin contact on both sides. Lock 01 01 1 P3W ® P3W 168-Pin DIMM Sockets 88 Pins 60 Pins 20 Pins FRONT 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) 3. H/W SETUP System Memory 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 per DIMM slot. ASUS P3W User's Manual 25

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ASUS P3W User’s Manual
25
3. HARDWARE SETUP
System Memory
3. H/W SETUP
3.5.2
DIMM 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. DIMMs are
longer and have different pin contact on each side and therefore have a higher pin
density. SIMMs have the same pin contact on both sides.
1
0
1
0
1
P3W
P3W 168-Pin DIMM Sockets
Lock
FRONT
20 Pins
60 Pins
88 Pins
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 per DIMM slot.