User Guide

24 ASUS P3C2000 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) of 64, 128, 256, or 512MB with Serial Presence Detect (SPD).
This chipset does not support ECC. However, ECC memory modules may still be
used, but the ECC function will not be available.
Memory speed setup is recommended through SDRAM Configuration in 4.4.1
Chip Configuration.
IMPORTANT:
1. This motherboard’s chipset only supports 64Mbit and 128Mbit SDRAMs
(see SDRAM Configurations).
32Mx4 128 Mbit support is for registered DIMMs only.
4Mx16 64 Mbit support is for unbufferred DIMMs only.
2. If more than one socket will be populated with DIMMs, the first socket in the
order must be populated with higher-sized DIMMs (in MB). For example,
DIMM1 ≥ DIMM3 ≥ DIMM2 ≥ DIMM4. Total memory size (in MB), how-
ever, of DIMM2 and DIMM4 must not be greater than DIMM1 and DIMM3
(DIMM1 + DIMM3 ≥ DIMM2 + DIMM4).
3.5.1 General DIMM Notes
• This motherboard only supports SPD DIMMs.
• SDRAM chips are generally thinner with higher pin density than EDO (Extended
Data Output) chips.
• BIOS shows SDRAM memory on bootup screen.
• Single-sided DIMMs come in 32, 64,128MB; double-sided come in 64, 128, 256,
512MB.
SDRAM Configurations
Technology Configuration No. of Row No. of Col. No. of Bank Page
Address Bits Address Bits Address Bits Size
64Mbit 8Mx8 12 9 2 4KB
64Mbit 4Mx16 12 8 2 2KB
128Mbit 32Mx4 12 11 2 16KB
128Mbit 16Mx8 12 10 2 8KB