Asus P5GD2 Deluxe P5GD2 Deluxe user's manual - Page 37

2.4 System memory 2.4.1 Overview The motherboard comes with four 240-pin Double Data Rate 2 (DDR2) Dual Inline Memory Modules (DIMM) sockets. A DDR2 module has the same physical dimensions as a DDR DIMM but has a 240-pin footprint compared to the 184-pin DDR DIMM. DDR2 DIMMs are notched differently to prevent installation on a DDR DIMM socket. The following figure illustrates the location of the sockets: P5GD2 DIMM_A1 DIMM_A2 DIMM_B1 DIMM_B2 ® P5GD2 Deluxe 184-Pin DDR DIMM sockets 2.4.2 Memory Configurations You may install 256 MB, 512 MB and 1 GB unbuffered non-ECC DDR2 DIMMs into the DIMM sockets using the memory configurations in this section. • In dual-channel configurations, we recommend to install i d e n t i c a l DDR2 DIMM pairs for each channel for optimum performance. • Always install DIMMs with the same CAS latency. For optimum compatibility, it is recommended that you obtain memory modules from the same vendor. See the DDR2 533 Qualified Vendors List (QVL) on page 2-14 for details. • Due to chipset resource allocation, the system may detect less than 4 GB of system memory when you installed four 1 GB DDR2 memory modules. • Due to chipset limitation, DIMM modules with 128 Mb memory chips or double-sided x16 memory chips are not supported in this motherboard. ASUS P5GD2 Deluxe 2-13