Asus P4C800 Deluxe P4C800 Deluxe user manual English version E1224 - Page 36
System memory
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2.5 System memory 2.5.1 Overview The motherboard comes with four Double Data Rate (DDR) Dual Inline Memory Module (DIMM) sockets. These sockets support up to 4GB system memory using 184-pin unbuffered ECC or non-ECC PC3200/ PC2700/PC2100 DDR DIMMs, and allow up to 6.4GB/s data transfer rate. The following figure illustrates the location of the DDR DIMM sockets. 104 Pins DIMM_A1 DIMM_A2 DIMM_B1 DIMM_B2 80 Pins ® P4C800 P4C800 184-Pin DDR DIMM Sockets 2.5.2 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 1. 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. 2. In dual-channel configurations, install only identical (the same type and size) DDR DIMM pairs for each channel. 3. Always install DIMMs with the same CAS latency. For optimum compatibility, it is recommended that you obtain memory modules from the same vendor. See list of qualified vendors on page 2-12. 4. Make sure that the memory frequency matches the CPU FSB (Front Side Bus). Refer to Table 2. 5. DIMMs installed into any three sockets will function in singlechannel mode. 6. When all four sockets are populated with 1GB DIMMs (total 4GB), the system may detect only 3+GB (a little less than 4GB) due to ICH5 resource allocation. 2-10 Chapter 2: Hardware information