Asus TRL-DLS manual 18

System	3.H/W
Memory	SETUP

3.HARDWARE SETUP

3.5.2Memory Installation

WARNING! Make sure that you unplug the power supply when adding or removing memory modules or other system components. Failure to do so may cause severe damage to both the motherboard and expansion cards (see 3.3 Hardware Setup Procedure for more information).

Insert a DIMM into the DIMM socket as shown. Because the number of pins are different on either side of the breaks, the module only fits in one direction. SDRAM DIMMs have different pin contacts on each side.

Pins20

TRL-DLSPins

60

Pins88

TRL-DLS 168-Pin DIMM Sockets

IMPORTANT: Always install DIMMs in pairs. See previous section for the memory configurations.

Use only 3.3Volt “ registered” SDRAM DIMMs. To determine the DIMM type, check the notches on the DIMMs (see the figure below).

The notches on the DIMM shifts 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.

18 ASUS TRL-DLS User’s Manual