Asus TX97-XV User Manual - Page 21

PIN DRAM DIMM Notch Key Definitions

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III. INSTALLATION 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. SIMM modules have the same pin contact on both sides. DIMM modules are longer and have different pin contact on each side and therefore have a higher pin density. Lock 60 Pins 20 Pins III. INSTALLATION (System Memory) 88 Pins 168 Pin DIMM Memory Sockets The Dual Inline Memory Module (DIMM) must be 3.3V Unbuffered for this motherboard. You can identify the type of DIMM module by the illustration below: DRAM Key Position Voltage Key Position RFU Unbuffered Buffered 5.0V Reserved 3.3V 168-PIN DRAM DIMM Notch Key Definitions The notch on the DIMM module will shift between left, center, or right to identify the type and also to prevent the wrong type of DIMM to be inserted into the DIMM socket on the motherboard. Four clock signals are supported on this motherboard. You must ask your retailer for the specifications before purchasing memory modules. ASUS TX97-XV User's Manual 21

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ASUS TX97-XV User’s Manual
21
III.
INSTALLATION
(System Memory)
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.
SIMM
modules have the same pin contact on both sides.
DIMM modules are longer and
have different pin contact on each side and therefore have a higher pin density.
168 Pin DIMM Memory Sockets
88 Pins
60 Pins
20 Pins
Lock
The Dual Inline Memory Module (DIMM) must be
3.3V Unbuffered
for this moth-
erboard.
You can identify the type of DIMM module by the illustration below:
168-PIN DRAM DIMM Notch Key Definitions
DRAM Key Position
Voltage Key Position
Unbuffered
RFU
Buffered
Reserved
3.3V
5.0V
The notch on the DIMM module will shift between left, center, or right to identify the
type and also to prevent the wrong type of DIMM to be inserted into the DIMM socket
on the motherboard.
Four clock signals are supported on this motherboard.
You must
ask your retailer for the specifications before purchasing memory modules.
III. INSTALLATION