Asus P2Z-VM DIMM Memory Installation Procedures:, H/W, System, P2Z-VM 168-PinDIMM Sockets

System	H/W .III
Memory	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.

88 Pins

60 Pins

P2Z-VM 20 Pins

Lock

P2Z-VM 168-Pin DIMM Sockets

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
RFU	Unbuffered	5.0V	Reserved
Buffered			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 per DIMM.

20 ASUS P2Z-VM User’s Manual