Asus P8H61 PRO User Manual - Page 26

1.7.2 Memory configurations You may install 512MB, 1GB, 2GB, and 4GB unbuffered 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: - Use a maximum of 3GB system memory if you are using a 32-bit Windows® OS. - Install a 64-bit Windows® OS when you want to install 4GB or more on the motherboard. • This motherboard does not support DIMMs made up of 512Mb (64MB) chips or less. • The maximum 16GB memory capacity can be supported with 8GB or above DIMMs. ASUS will update the memory QVL once the DIMMs are available in the market. • The default memory operation frequency is dependent on its Serial Presence Detect (SPD), which is the standard way of accessing information from a memory module. Under the default state, some memory modules for overclocking may operate at a lower frequency than the vendor-marked value. To operate at the vendor-marked or at a higher frequency, refer to section 2.4 Ai Tweaker menu for manual memory frequency adjustment. • For system stability, use a more efficient memory cooling system to support a full memory load (2 DIMMs) or overclocking condition. P8H61 PRO Motherboard Qualified Vendors List (QVL) DDR3-1066MHz capability Vendors Part No. Size SS/ DS Crucial CT25664BA1067.16FF 2GB DS ELPIDA EBJ21UE8EDF0-AE-F 2GB DS KINGSTON KINGSTON KINGSTON Micron OCZ KVR1066D3N7/1G KVR1066D3N7/2G KVR1066D3N7/4G MT16JTF25664AZ-1G1F1 OCZ3G1066LV4GK 1GB SS 2GB DS 4GB DS 2GB DS 4GB(2 x 2GB) DS Chip Brand Chip NO. Micron ELPIDA KTC ELPIDA Hynix Micron Micron 9HF22D9KPT J1108EDSE-DJ-F D1288JPNDPLD9U J1108BDSE-DJ-F H5TQ2G83AFR 9HF22D9KPT 9BF27D9KPV Timing 7 - 7 7 7 7 7-7-7-20 Voltage 1.35V(low voltage) 1.5V 1.5V 1.5V 1.65V DIMM socket support (Optional) 1 DIMM 2 DIMMs • • • • • • • • • • • • • • 1-14 Chapter 1: Product introduction