Asus M5A78L LE User Manual - Page 22

1.7.2 Memory configurations 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. • We recommend that you install the memory modules from the blue slots for better overclocking capability. • AMD® FX™ Series CPU on this motherboard supports up to DDR3 1866MHz as its standard memory frequency. • Due to the CPU specification, AMD® 100 and 200 series CPUs support up to DDR3 1066MHz. With ASUS design, this motherboard can support up to DDR3 1333MHz. • When overclocking, some AMD CPUs may not support DDR3 1600MHz or higher frequency DIMMs. • 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 followings: - 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. • This motherboard does not support DIMMs made up of 256 megabits (Mb) chips or less. M5A78L series Motherboards Qualified Vendors Lists (QVL) DDR3-2000(O.C.) MHz capability Vendor Part No. Transcend TX2400KLU-4GK(XMP) Size SS/ DS 4GB ( 2x 2GB ) DS Chip Brand - Chip NO. - CL Voltage 9-11-9-28 1.65V DIMM support A* B* C* • • DDR3-1866(O.C.)MHz capability Vendor Part No. Size SS/ DS Corsair CMT4GX3M2A1866C9(XMP) 4GB(2 x 2GB) DS Kingston KHX1866C9D3T1K3/3GX(XMP) 3GB(3 x 1GB) SS Kingston KHX1866C9D3T1K3/6GX(XMP) 6GB(3 x 2GB) SS OCZ OCZ3G1866LV4GK 4GB(2 x 2GB) DS OCZ OCZ3P1866LV4GK 4GB(2 x 2GB) DS Chip Chip Brand NO. - - - - - - - - - - CL 9-9-9-24 - 10-10-10-27 9-9-9-27 Voltage DIMM support A* B* C* 1.65V • • 1.65V • • 1.65V • • 1.65V • • 1.65V • • 1-12 Chapter 1: Product introduction