Asus P7H55-M SI User Manual - Page 14

1.4.2 Memory configurations You may install 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. • For dual-channel configuration, you can: - install two identical DIMMs in DIMM_A1 and DIMM_B1; or - install four identical DIMMs in all four slots; or - install one identical DIMM pair in DIMM_A1 and DIMM_B1 (blue slots) and another identical DIMM pair in DIMM_A2 and DIMM_B2 (black slots). • 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: - 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. P7H55-M SI Motherboard Qualified Vendors List (QVL) DDR3-1333MHz capability Vendor Part No. Size SS/ DS Chip Brand Chip No. A-Data A-Data AD31333001GOU AD31333G001GOU 1024MB SS A-Data 3072MB(Kit of 3) SS - AD30908C8D-151C E0906 Heat-Sink Package A-Data A-Data AD31333002GOU AD31333G002GMU 2048MB 2048MB DS A-Data DS - AD30908C8D-151C E0903 Heat-Sink Package Apacer CORSAIR CORSAIR CORSAIR CORSAIR CORSAIR CORSAIR CORSAIR CORSAIR Crucial Crucial Crucial Crucial Crucial ELPIDA 78.A1GC6.9L1 2048MB CM3X1024-1333C9DHX 1024MB CM3X1024-1333C9 1024MB TR3X3G1333C9 G 3072MB(Kit of 3) TR3X3G1333C9 G 3072MB(Kit of 3) TR3X3G1333C9 3072MB(Kit of 3) CM3X1024-1333C9DHX 1024MB CM3X2048-1333C9DHX 2048MB TW3X4G1333C9 G 4096MB(Kit of 2) CT12864BA1339.8FF 1024MB BL12864TA1336.8SFB1 2048MB(Kit of 2) CT25664BA1339.16FF 2048MB BL25664ABA1336.16SFB1 4096MB(Kit of 2) BL25664BN1337.16FF (XMP) 6144MB(Kit of 3 ) EBJ10UE8EDF0-DJ-F 1024MB DS APACER SS SS SS SS SS DS Corsair DS DS SS Micron SS DS Micron DS DS SS ELPIDA AM5D5808DEWSBG Heat-Sink Package Heat-Sink Package Heat-Sink Package Heat-Sink Package Heat-Sink Package Heat-Sink Package Heat-Sink Package Heat-Sink Package 9FF22D9KPT Heat-Sink Package 9KF27D9KPT Heat-Sink Package Heat-Sink Package J1108EDSE-DJ-F (continued on the next page) Timing DIMM (BIOS) Voltage DIMM Support A* B* C* - - • •• 8-8-8-24 1.65 1.85V - - • •• 8-8-8-24 1.65 1.85V - - • •• 9-9-9-24 1.60V • • • - - • •• 9-9-9-24 1.50V • • • 9-9-9-24 1.50V • • • 9 1.5V • • • - - • •• - - • •• 9-9-9-24 1.50V • • • 9 - • •• 6-6-6-20 1.8V • • • 9 - • •• 6-6-6-20 1.8V • • • 7-7-7-24 1.65V • • • - 1.35V(low voltage) 1-4 Chapter 1: Product introduction