Asus M4A77T M4A77T user's manual - Page 21

1.7.2 You may install 512MB, 1GB, 2GB, and 4GB unbuffered ECC and non-ECC DDR3 DIMMs into the DIMM sockets. • You may install varying memory sizes in Channel A and Channel B. The system maps the total size of the lower-sized channel for the dual-channel configuration. Any excess memory from the higher-sized channel is then mapped for single-channel operation. • Always install DIMMs with the same CAS latency. For optimum compatibility, we recommend that you obtain memory modules from the same vendor. • Due to the memory address limitation on 32-bit Windows® OS, when you install 4GB or more memory on the motherboard, the actual usable memory for the OS can be about 3GB or less. For effective use of memory, we recommend that you do any of the following Install a maximum of 3GB system memory if you are using a 32-bit Windows® OS. Use a 64-bit Windows® OS if you want to install 4GB or more memory on the motherboard. Memory configurations • This motherboard does not support DIMMs made up of 256 megabits (Mb) chips or less. M4A77T Motherboard Qualified Vendors Lists (QVL) DDR3-1866(O.C.)MHz capability Vendor Kingston Part No. KHX14900D3K3/3GX(XMP) Size 3072MB(kit of 3) SS/ DS SS Chip Brand N/A Chip NO. Heat-Sink Package CL 9-9-9-27 DIMM support A* • B* • C* DDR3-1800(O.C.)MHz capability Vendor Corsair Kingston Kingston Kingston Part No. CM3X2G1800C8D KHX14400D3K2/2G KHX14400D3K3/3GX(XMP) KHX14400D3K2/2GN(EPP) Size 2048MB 2048MB(Kit of 2) 3072MB(kit of 3) 4096MB(kit of 2) SS/ DS DS SS SS DS Chip Brand N/A N/A N/A N/A Chip NO. Heat-Sink Package Heat-Sink Package Heat-Sink Package Heat-Sink Package CL A* N/A 8-8-8-24 9-9-9-27 8-8-8-24 DIMM support B C* ASUS M4A77T 1-11