User`s manual

ASUS P2B User’s Manual 17
III. INSTALLATION
System Memory
2. System Memory (DIMM)
Only Dual Inline Memory Modules (DIMM’s) can be used with this motherboard.
Three sockets are available for 3.3Volt (power level) Unbuffered Synchronous
DRAMs (SDRAMs) or EDO DRAMs of either 8, 16, 32, 64, or 128MB to form a
memory size between 8MB to 512MB. One side (with memory chips) of the DIMM
module takes up one Row on the motherboard.
IMPORTANT: Do not mix SDRAMs and EDO DRAMs.
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 parity chip) and
make the proper settings in the BIOS Chipset Features Setup.
IMPORTANT: Memory speed setup is required through “Auto Configuration” in
BIOS Chipset Features Setup.
Install memory in any combination as follows:
DIMM Location 168-pin DIMM Memory Modules Total Memory
Socket 1 (Rows 0&1) SDRAM/EDO 8, 16, 32, 64, 128MB x1
Socket 2 (Rows 2&3) SDRAM/EDO 8, 16, 32, 64, 128MB x1
Socket 3 (Rows 4&5) SDRAM/EDO 8, 16, 32, 64, 128MB x1
Total System Memory (Max 384MB) =
General DIMM Notes (not true for all memory modules)
• Four possible memory chips are supported: EDO or SDRAM with and without parity.
Mixing SDRAMs with EDO DRAMs, or vice-versa, is, however, not allowed.
• SDRAM chips are generally thinner with higher pin density than EDO chips.
• BIOS shows EDO or SDRAM memory on bootup screen.
• 8 chips/side modules do not support parity, only 9 chips/side modules support parity.
• Single sided modules are usually 16, 32, or 64 MB, double sided are usually 32, 64, or 128MB.
ASUS Memory Examples:
III. INSTALLATION
Parity EDO DIMM (9 chips)
Non-Parity SDRAM DIMM (8 chips)