A SERVICE OF

logo

Open as PDF
next previous
20 ASUS TXP4 User’s Manual
III. INSTALLATION
(System Memory)
III. INSTALLATION
DIMM Installation
Insert the modules as shown. Because the number of pins are different on either side
of the breaks, the modules will only fit in the orientation as shown. SIMM modules
have the same pin contacts on both sides. DIMM modules are longer and have dif-
ferent pin contacts on each side and therefore have a higher pin density.
168-Pin DIMM Sockets
R
Lock
88 Pins
60 Pins
20 Pins
12
Use only 3.3-volt unbuffered DIMMs. The notch in the DIMM module will shift
between left, center, or right to identify the type and also to prevent the wrong type of
DIMM from being inserted into the DIMM socket (see illustration below). Four clock
signals are supported on this motherboard. Ask your retailer for the specifications
before purchasing memory modules.
168-Pin DIMM Notch Key Definitions (3.3V)
DRAM Key Position
Voltage Key Position
Unbuffered
RFU
Buffered
Reserved
3.3V
5.0V