Dimm Memory Installation Procedures - Asus P2L97-DS User Manual

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. DIMM
modules are longer and have different pin contact on each side and therefore have a
higher pin density. SDRAM DIMM modules have a different pin contact on each
side and therefore have a higher pin density.
20 Pins 60 Pins
88 Pins
Lock
168-Pin DIMM Memory Sockets
(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)
DRAM Key Position Voltage Key Position
Reserved
RFU Unbuffered 5.0V
3.3V
Buffered
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 tell your retailer the correct DIMM type before purchas-
ing. This motherboard supports four clock signals.
PB ASUS P2L97-DS User's Manual