Asus P4P800-MX P4P800-MX user's manual - Page 24

Table 1 Recommended memory configurations Mode Single-channel Dual-channel Sockets DIMM_A1 DIMM_A2 DIMM_B1 DIMM_B2 (blue) (black) (blue) (black) (1) Populated - - - (2) - Populated - - (3) - - Populated - (4) - - - Populated (1) Populated - Populated - (2) - Populated - Populated (3)* Populated Populated Populated Populated * For dual-channel configuration (3), you may: • install identical DIMMs in all four sockets, or • install identical DIMMs in DIMM_A1 and DIMM_B1 (blue sockets) and identical DIMMs in DIMM_A2 and DIMM_B2 (black sockets) Table 2 Memory frequency/CPU FSB synchronization This motherboard supports different memory frequencies depending on the CPU FSB (Front Side Bus) and the type of DDR DIMM. CPU FSB 800 MHz 533 MHz 400 MHz DDR DIMM Type Memory Frequency PC3200/PC2700*/PC2100 PC2700/PC2100 PC2100 400/333*/266 MHz 333/266 MHz 266 MHz *When using 800MHz CPU FSB, PC2700 DDR DIMMs may run only at 320MHz (not 333MHz) due to chipset limitation. 1-14 Chapter 1: Product introduction