Asus P7H55-M LX User Manual - Page 13

1.4.2 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, it is recommended that you obtain memory modules from the same vendor. • Due to the memory address limitation on the 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 either of the following: - Use 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. P7H55-M LE Series Motherboard Qualified Vendors List (QVL) DDR3-1333MHz capability Vendor A-Data A-Data A-Data Apacer CORSAIR CORSAIR CORSAIR CORSAIR CORSAIR CORSAIR CORSAIR CORSAIR CORSAIR Crucial Crucial Crucial Crucial Crucial Crucial ELPIDA ELPIDA G.SKILL G.SKILL Part No. Size SS/ Chip DS Brand Chip No. AD31333001GOU 1024MB SS AD31333G001GOU 3072MB(Kit of 3) SS AD31333G002GMU 2048MB DS 78.A1GC6.9L1 2048MB DS CM3X1024-1333C9DHX 1024MB SS CM3X1024-1333C9 1024MB SS TR3X3G1333C9 G 3072MB(Kit of 3) SS TR3X3G1333C9 G 3072MB(Kit of 3) SS TR3X3G1333C9 3072MB(Kit of 3) SS CM3X1024-1333C9DHX 1024MB DS CM3X2048-1333C9DHX 2048MB DS TW3X4G1333C9 G 4096MB(Kit of 2) DS CMX8GX3M4A1333C9 8192MB(Kit of 4) DS CT12864BA1339.8FF 1024MB SS BL12864TA1336.8SFB1 2048MB(Kit of 2) SS CT25664BA1339.16FF 2048MB DS BL25664ABA1336.16SFB1 4096MB(Kit of 2) DS BL25664BA1336.16SFB1 4096MB(Kit of 2) DS BL25664BN1337.16FF (XMP) 6144MB(Kit of 3 ) DS EBJ10UE8EDF0-DJ-F 1024MB SS A-Data AD30908C8D-151C E0906 - - - - APACER AM5D5808DEWSBG - - - - - - - - - - Corsair - - - - - - - Micron 9FF22D9KPT - - Micron 9KF27D9KPT - - - - - - ELPIDA J1108EDSE-DJ-F EBJ21UE8EDF0-DJ-F 2048MB DS ELPIDA J1108EDSE-DJ-F F3-10666CL7T-3GBPK 3072MB(Kit of 3) SS - - F3-10666CL9T-3GBNQ 3072MB(Kit of 3) SS - - Timing DIMM (BIOS) 8-8-8-24 8-8-8-24 9-9-9-24 9-9-9-24 9-9-9-24 9-9-9-24 9 9-9-9-24 9-9-9-24 9 6-6-6-20 9 6-6-6-20 6-6-6-20 7-7-7-24 - - 7-7-7-18 9-9-9-24 Voltage DIMM Support A* B* - • 1.65-1.85V • • 1.65-1.85V • • - •• 1.60V • • 1.60V • 1.50V • 1.50V • • 1.5V •• - • - •• 1.50V • • 1.50V • - •• 1.8V •• - •• 1.8V • 1.8V •• 1.65V • • 1.35V(low • • voltage) 1.35V(low • • voltage) 1.5~1.6V • • 1.5~1.6V • • (continued on the next page) ASUS P7H55-M LE Series 1-4