Asus P4G8X P4G8X User Manual - Page 38

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 on memory configurations 1. Installing DDR DIMMs other than the recommended configurations may cause memory sizing error or system boot failure. See Table 1 for the recommended configurations. 2. Install only identical (the same type and size) DDR DIMM pairs using the recommended configurations. 3. Make sure that the memory frequency matches the CPU FSB (Front Side Bus). Refer to Table 2 below. 4. Double-sided x16 DDR DIMMs are not supported on this motherboard. 5. It is not recommended to create a three-DIMM configuration in dual-channel mode. The third DIMM is ignored in the dual-channel operation. Table 1 Recommended memory configurations Mode Single-channel Dual-channel* Sockets DIMM_A1 DIMM_B1 DIMM_A2 DIMM_B2 - (1) Installed (2) - (3) Installed - Installed - Installed Installed - Installed Installed - - Installed Installed * Use only identical DDR DIMM pairs. Table 2 Memory frequency/CPU FSB synchronization CPU FSB 533 MHz 400 MHz DDR DIMM Type PC2100 PC1600 Memory Frequency 266 MHz 200 MHz 2-12 Chapter 2: Hardware information