Asus P4P800-X - Manual (Page 19)

ASUS P4P800-X motherboard 1-9
1.7 System memory
1.7.1 DIMM sockets location
The following figure illustrates the location of the DDR DIMM sockets.
1.7.2 Memory 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
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.
• Installing DDR DIMMs other than the recommended configurations may
cause memory sizing error or system boot failure. Use any of the
recommended configurations in Table 1.
• Use the blue DIMM slots first.
• In Dual-channel configurations, install only identical (the same type and
size) DDR DIMM pairs for each channel.
• Always install DIMMs with the same CAS latency, otherwise, the system
may run in a lower frequency. For optimum compatibility, it is recommended
that you obtain memory modules from the same vendor. See list of
Qualified Vendors List on page 1-10.
• When all four sockets are populated with 1GB DIMMs (Total 4 GB), the
system may detect only 3+ GB (a little less than 4 GB) due to the
SouthBridge resource allocation.
• Three DDR DIMMs installed into any three memory sockets will function in
single channel mode.
• Make sure that the memory frequency matches the CPU FSB. Refer to
Table 2 for configurations.
P4P800-X
®
P4P800-X 184-Pin DDR DIMM sockets
80 Pins
104 Pins
DIMM_A1 DIMM_A2 DIMM_B1 DIMM_B2