Asus KFN5-Q User Guide - Page 33

2.4 System memory 2.4.1 Overview The motherboard comes with eight 240-pin Double Data Rate II (DDR2) Dual Inline Memory Modules (DIMM) sockets. The following figure illustrates the location of the sockets: 128 Pins R KFNS-D-SLI KFN5-D SLI 240-pin DDR2 DIMM Sockets For CPU 1 Channel A Channel B For CPU 2 Channel A Channel B Sockets DIMM_A1 and DIMM_A2 DIMM_B1 and DIMM_B2 Sockets DIMM_A3 and DIMM_A4 DIMM_B3 and DIMM_B4 112 Pins DIMM_B2 DIMM_B1 DIMM_A2 DIMM_A1 DIMM_A3 DIMM_A4 DIMM_B3 DIMM_B4 2.4.2 Memory Configurations You may install 256 MB, 512 MB, 1 GB, or 2GB registered ECC DDR2 533/667 DIMMs into the DIMM sockets using the memory configurations in this section. • For dual-channel configuration, the total size of memory module(s) installed per channel must be the same for better performance. Single CPU: DIMM_A1+DIMM_A2=DIMM_B1+DIMM_B2 Dual CPU: DIMM_A1+DIMM_A2=DIMM_B1+DIMM_B2 DIMM_A3+DIMM_A4 =DIMM_B3+DIMM_B4 • Always install DIMMs with the same CAS latency. For optimum compatibility, we recommend that you obtain memory modules from the same vendor. Refer to the DDR2 Qualified Vendors List at the ASUS web site. ASUS KFN5-D SLI 2-13