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24 ASUS CUSL2-M User’s Manual
3. HARDWARE SETUP
System Memory
3. H/W SETUP
3.5 System Memory (DIMM)
NOTE: No hardware or BIOS setup is required after adding or removing memory.
This motherboard uses only Dual Inline Memory Modules (DIMMs). Sockets are
available for 3.3Volt (power level) unbuffered Synchronous Dynamic Random Ac-
cess Memory (SDRAM). One side (with memory chips) of the DIMM takes up one
row on the motherboard.
Memory speed setup is recommended through SDRAM Configuration in 4.4.1
Chip Configuration.
NOTE: If the total installed memory exceeds 512MB, the system will hang during
startup.
3.5.1 General DIMM Notes
• For the system CPU bus to operate at 133MHz, use only PC133-compliant
DIMMs. When this motherboard operates at 133MHz, most system will not
even boot if non-compliant modules are used because of the strict timing issues
involved under this speed. If your DIMMs are not PC133-compliant, set the
CPU bus frequency to 100MHz RAM to ensure system stability.
• ASUS motherboards support SPD (Serial Presence Detect) DIMMs. This is the
memory of choice for best performance vs. stability.
• BIOS shows SDRAM memory on bootup screen.
• Single-sided DIMMs come in 16, 32, 64,128, 256MB; double-sided come in 32,
64, 128, 256, 512MB.
Install memory in any combination as follows:
DIMM Location 168-pin DIMM Total Memory
Socket 1 (Rows 0&1) SDRAM 8, 16, 32, 64, 128, 256, 512MB x1
Socket 2 (Rows 2&3) SDRAM 8, 16, 32, 64, 128, 256, 512MB x1
Socket 3 (Rows 4&5) SDRAM 8, 16, 32, 64, 128, 256, 512MB x1
Total System Memory (Max 512MB) =