1.7System memory

1.7.1 DIMM sockets location

The following figure illustrates the location of the DDR DIMM sockets.

P4U800-X

P4U800-X 184-Pin DDR DIMM Sockets

80 Pins 104 Pins

DIMM1

DIMM2

DIMM3

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.

1.7.2Memory configurations

You may install 64MB, 128MB, 256MB, 512MB, and 1GB DDR DIMMs into the DIMM sockets using the memory configurations in this section.

Important notes

1.For optimum compatibility, it is recommended that you obtain memory

modules from the same vendor. See the DDR400 Qualified Vendor List (QVL) on page 1-10.

2.Always install DIMMs with the same CAS Latency.

3.Double-sided DDR DIMMs with x16 (data bus=16bit) memory chips are not supported due to chipset limitation.

ASUS P4U800-X motherboard

1-9