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System Memory

III. H/W SETUP

III. HARDWARE SETUP

DIMM Memory Installation Procedures:

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. 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

20 Pins 60 Pins

88 Pins

R

FRONT

The DIMMs must be 3.3Volt unbuffered SDRAMs. To determine the DIMM type,
check the notches on the DIMMs (see figure below).

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.

DRAM Key Position

Voltage Key Position

RFU

Buffered

Reserved

5.0V