Owner manual

III. HARDWARE SETUP
ASUS P5S-B User’s Manual 25
System Memory
III. H/W SETUP
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) of either 8, 16, 32, 64, 128MB, or 256MB to form a memory
size between 8MB and 768MB. 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 in Chipset Features Setup under BIOS SETUP.
Memory speed setup is recommended through SDRAM Configuration in Chipset
Features Setup under BIOS SETUP.
IMPORTANT! (see Notes below)
• To make using bus speeds ≥95MHz possible, SDRAMs used must be com-
patible with the current Intel PC100 SDRAM specification..
Install memory in any combination as follows:
DIMM Location 168-pin DIMM Total Memory
DIMM1 (Rows 0&1) SDRAM 8, 16, 32, 64, 128, 256MB x1
DIMM2 (Rows 2&3) SDRAM 8, 16, 32, 64, 128, 256MB x1
DIMM3 (Rows 4&5) SDRAM 8, 16, 32, 64, 128, 256MB x1
Total System Memory (Max 768MB) =
NOTES
• DIMMs that have more than 18 chips are not supported on this motherboard.
• To make using bus speeds ≥95MHz possible, use only PC100-compliant
DIMMs. Most systems will not even boot if non-compliant modules are used
because of the strict timing issues involved with speeds ≥95MHz.
• SDRAM chips are generally thinner and have higher pin density than EDO (Ex-
tended Data Output) chips.
• BIOS shows SDRAM memory on bootup screen.
• Single-sided DIMMs are available in 16, 32, 64, 128MB; double-sided in 32, 64, 128,
256MB.