Asus P4P800-X P4P800-X user's manual English version E1718 - Page 19

1.7 System memory 1.7.1 DIMM sockets location The following figure illustrates the location of the DDR DIMM sockets. 80 Pins 104 Pins P4P800-X ® P4P800-X 184-Pin DDR DIMM sockets DIMM_A1 DIMM_A2 DIMM_B1 DIMM_B2 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. 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 • 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. ASUS P4P800-X motherboard 1-9