Asus P5G31D-M PRO T-P5G31 user's manual - Page 28

2.6 Installing a DIMM The system motherboard comes with two Double Data Rate 2 (DDR2) Dual Inline Memory Module (DIMM) sockets. The following figure illustrates the location of the sockets: R P5K18L 128 Pins 112 Pins DIMM_A1 DIMM_B1 P5K18L 240-pin DDR2 DIMM Sockets 2.6.1 Memory configurations You may install up to 4 GB system memory using 256 MB, 512 MB, 1 GB, and 2 GB DDR2 DIMMs. • Installing DDR2 DIMMS other than the recommended configurations may cause memory sizing error or system boot failure. Use any of the recommended configurations in the table on the next page. • Install only identical (the same type and size) DDR2 DIMMs in DIMM_A1 and DIMM_B1. • Always install DIMMs with the same CAS latency. For optimum compatibility, we recommend that you obtain memory modules from the same vendor. • Due to chipset resource allocation, the system may detect less than 4 GB system memory when you installed two 2 GB DDR2 memory. • This motherboard does not support memory modules made up of 128 Mb chips or double-sided x16 memory modules. Recommended memory configurations Mode Single-channel DIMM_A1 Populated Sockets Dual-channel Populated DIMM_B1 Populated Populated 2- Chapter 2: Basic installation