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ASUS A7M266-D User’s Manual
3. HARDWARE SETUP
3. H/W SETUP
System Memory
3.5.1 Memory Installation
WARNING! Make sure that you unplug your power supply when adding or
removing memory modules or other system components. Failure to do so may
cause severe damage to both your motherboard and expansion cards
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 shown. A 184-pin DDR
SDRAM DIMM has a single notch slightly to the right of center. This motherboard
supports three pairs of differential clock signals per DIMM.
3.5.2 General DIMM Memo
• DIMMs that have more than 18 chips are not supported on this motherboard.
• For the system CPU bus to operate at 200MHz/266MHz, use only PC1600-/
PC2100-compliant DIMMs.
• ASUS motherboards support SPD (Serial Presence Detect) DIMMs. This is the
memory of choice for best performance vs. stability.
• Single-sided DDR DIMMs come in 64, 128, 256 and 512MB; double-sided come in
128, 256, 512MB and 1GB.
• Please refer to Appendix 7.1 for a list of Qualified Vendors for DIMMs that have
been tested for use with the A7M266-D motherboard.
Installing a DIMM:
1. Unlock a DIMM socket by pressing the retaining clips outward.
2. Align a DIMM on the socket such that the notches on the DIMM exactly
match the notches in the socket.
3. Firmly insert the DIMM into the socket until the retaining clips snap back in
place.
Unlocked Retaining Clip Locked Retaining Clip
WARNING! Be sure that the DIMMs you use can handle the specified DDR
SDRAM MHz or else bootup will not be possible.