Installing System Memory; Memory Configurations - Asus Vintage User Manual

2.6 Installing system memory

The motherboard comes with two Double Data Rate (DDR) Dual Inline
Memory Module (DIMM) sockets. These sockets support up to 2 GB
system memory using unbuffered ECC or non-ECC PC2700/1600/2100
DIMMs.
P4S800-MX 184-Pin DDR DIMM Sockets

2.6.1 Memory configurations

You may install any DDR DIMMs with 64 MB, 128 MB, 256 MB, 512 MB,
and 1 GB densities into the DIMM sockets.
Memory frequency/CPU FSB synchronization
CPU FSB
800MHz
533MHz
400MHz
*When using 800 MHz CPU FSB, PC2700 DDR DIMMs may run only at
320 MHz (not 333 MHz) due to chipset limitation.
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DDR DIMM Type
PC3200/PC2700/PC2100
PC2700/PC2100
PC2100
Memory Frequency
400/333*/266 MHz
333/266 MHz
266 MHz
Chapter 2: Basic Installation