Asus P4B533-X 1.7.1 DIMM sockets location, Table 1 Memory frequency/CPU FSB synchronization, CPU FSB, 800 MHz, 533 MHz, 400 MHz, 266/200 MHz, 400/333* MHz, DDR DIMM Type

1.7System 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

DIMM1	DIMM2	Pins
		80
		104 Pins

P4B533-X 184-Pin DDR DIMM Sockets

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.

Obtain DDR DIMMs only from ASUS qualified vendors. Visit the ASUS website (www.asus.com) for the latest QVL.

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.

It is recommended to populate only one DIMM slot when using FSB800/DDR400, FSB800/DDR300 and FSB533/DDR355 overlocking mode features.

1-10 Chapter 1: Product introduction