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ASUS P2B-L/P2B-S/P2B-LS User’s Manual 17
2. System Memory (DIMM)
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.
To utilize the chipset’s Error Checking and Correction (ECC) feature, you must use a
DIMM module with 9 chips per side (standard 8 chips/side + 1 ECC chip) and make
the proper settings through “Chipset Features Setup” in IV. BIOS SOFTWARE.
Memory speed setup is recommended through SDRAM Configuration under “Chipset
Features Setup”.
IMPORTANT: SDRAMs used must be compatible with the current Intel PC100
SDRAM specification.
III. INSTALLATION
III. INSTALLATION
System Memory
General DIMM Notes
• Use only PC100-compliant DIMMs. This motherboard operates at 100MHz,
thus most systems will not even boot if non-compliant modules are used be-
cause of the strict timing issues involved under this speed.
• Two possible memory chips are supported: SDRAM with and without ECC.
• SDRAM chips are generally thinner with higher pin density than traditional
EDO (Extended Data Output) chips.
• BIOS shows SDRAM memory on bootup screen.
• 8 chips/side modules do not support ECC, only 9 chips/side modules support ECC.
• Single-sided DIMMs come in 16, 32, 64,128MB and double-sided DIMMs come
in 32, 64, 128, 256MB sizes.
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, 256MB x1
Socket 2 (Rows 2&3) SDRAM 8, 16, 32, 64, 128, 256MB x1
Socket 3 (Rows 4&5) SDRAM 8, 16, 32, 64, 128, 256MB x1
Socket 4 (Rows 6&7) SDRAM 8, 16, 32, 64, 128, 256MB x1
Total System Memory (Max 1024MB) =
SDRAM DIMM (8 chips, Non-ECC)
ASUS Memory Module Example: