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Chapter 1: Product introduction
Obtain DDR DIMMs only from ASUS qualified vendors. Visit the ASUS website
(www.asus.com) for the latest QVL.
1.7 System memory
1.7.1 DIMM sockets location
The following figure illustrates the location of the DDR DIMM sockets. You may
install 64MB, 128MB, 256MB, 512MB, and 1GB unbuffered DDR DIMMs into this
motherboard.
P4B533-X
®
P4B533-X 184-Pin DDR DIMM Sockets
80 Pins104 Pins
DIMM1
DIMM2
1. Make sure to unplug the power supply before adding or removing DIMMs or
other system components. Failure to do so may cause severe damage to
both the motherboard and the components.
2. When installing long AGP cards, it is recommended to install the memory
modules first. Long AGP cards, when installed, may interfere with the
memory sockets.
It is recommended to populate only one DIMM slot when using
FSB800/DDR400, FSB800/DDR300 and FSB533/DDR355 overlocking
mode features.
Table 1 Memory frequency/CPU FSB synchronization
This motherboard supports different memory frequencies depending on the CPU
FSB (Front Side Bus) and the type of DDR DIMM.
CPU FSB DDR DIMM Type Memory Frequency
800 MHz* PC3200/PC2700* 400/333* MHz
533 MHz PC3200**/PC2700**/PC2100/PC1600 400**/333**/266/200 MHz
400 MHz PC2100/PC1600 266/200 MHz
* When using 800MHz CPU FSB, PC2700 DDR DIMMs run only at 300MHz (not 333MHz)
** When using 533MHz CPU FSB, PC3200/2700 DDR DIMMs may run only at 355MHz/
266MHz (not 400/333MHz) due to chipset limitation.