Asus AP1720-E2 AP1720-E2 English version manual - Page 30
System memory
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2.4 System memory 2.4.1 Overview The motherboard comes with four Double Data Rate (DDR) Dual Inline Memory Module (DIMM) sockets. The following figure illustrates the location of the DDR DIMM sockets. DIMM_B2 80 Pins DIMM_A2 DIMM_B1 DIMM_A1 NCCH-DL ® 104 Pins NCCH-DL 184-pin DDR DIMM sockets 2.4.2 Memory configurations You may install unbuffered ECC or non-ECC 64MB, 128MB, 256MB, 512MB, and 1GB DDR DIMMs into the DIMM sockets using the recommended memory configurations. Important notes 1. Installing DDR DIMMs other than the recommended configurations may cause memory sizing error or system boot failure. Use any of the recommended configurations in Table 1. 2. In dual-channel configurations, install only identical (the same type and size) DDR DIMM pairs for each channel. 3. Always install DIMMs with the same CAS latency. For optimum compatibility, it is recommended that you obtain memory modules from the same vendor. 4. Make sure that the memory frequency matches the CPU FSB (Front Side Bus). Refer to Table 2. 5. DIMMs installed into any three sockets will function in singlechannel mode. 6. When all four sockets are populated with 1GB DIMMs (total 4GB), the system may detect only about 3.6+ GB (less than 4 GB) due to resource allocation on onboard devices. 2-10 Chapter 2: Hardware setup