Asus P5N32-SLI-Deluxe P5N32-SLI Deluxe User's Manual for English Edition - Page 42

2.4.2 Memory configurations You may install 256 MB, 512 MB, 1 GB, 2 GB, and 4 GB unbuffered non-ECC DDR2 DIMMs into the DIMM sockets. • If you installed four 1 GB memory modules, the system may detect less than 3 GB of total memory because of address space allocation for other critical functions. This limitation applies to Windows® XP 32-bit version operating system since it does not support Physical Address Extension (PAE). • If you installed Windows® XP 32-bit version operating system, we recommend that you install less than 3 GB of total memory. • For dual-channel configuration, the total size of memory module(s) installed per channel must be the same (DIMM_A1 + DIMM_A2 = DIMM_B1 + DIMM_B2). • Always install DIMMs with the same CAS latency. For optimum compatibility, we recommend that you obtain memory modules from the same vendor. Refer to the DDR2 Qualified Vendors List on the next page for details. • Due to chipset resource allocation, the system may detect less than 16 GB system memory when you installed four 4 GB DDR2 memory modules. • This motherboard does not support memory modules made up of 2048 Mb chips or double sided x16 memory modules. The motherboard can support up to 16 GB on the operating systems listed below. You may install a maximum of 4 GB DIMMs on each slot. 32-bit Windows® 2000 Advanced Server Windows® Server 2003 Enterprise Edition 64-bit Windows® Server 2003 Standard x64 Edition Windows® XP Professional x64 Edition Windows® Server 2003 Enterprise x64 Edition 2-16 Chapter 2: Hardware information