Asus P2B-DS P2B-DS User Manual - Page 18

DIMM Memory Installation Procedures

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1 R 1 III. INST ALLATION System Memory III. INSTALLATION DIMM Memory Installation Procedures Insert the module(s) as shown. Because the number of pins is different on either side of the breaks, the module will only fit in the orientation as 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. 20 Pins 60 Pins 88 Pins Lock P2B-D/DS 168-Pin DIMM Memory Sockets (FRONT) 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 RFU Unbuffered Buffered Voltage Key Position 5.0V Reserved 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. 18 ASUS P2B-D/P2B-DS User's Manual

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ASUS P2B-D/P2B-DS User’s Manual
System Memory
III.
INST ALLATION
III. INSTALLATION
DIMM Memory Installation Procedures
Insert the module(s) as shown. Because the number of pins is different on either side
of the breaks, the module will only fit in the orientation as 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
P2B-D/DS 168-Pin DIMM Memory Sockets
88 Pins
60 Pins
20 Pins
(FRONT)
1
1
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
Unbuffered
RFU
Buffered
Reserved
3.3V
5.0V
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.