Asus K7M K7M User Manual - Page 22

3. H/W SETUP System Memory 3. HARDWARE SETUP 3.5 System Memory (DIMM) NOTE: No hardware or BIOS setup is required after adding or removing memory. This motherboard uses only Dual Inline Memory Modules (DIMMs). Sockets are available for 3.3Volt (power level) unbuffered Synchronous Dynamic Random Access Memory (SDRAM) of 16, 32, 64, 128MB, or 256MB. to form a memory size between 16MB and 768MB. One side (with memory chips) of the DIMM takes up one row on the motherboard. To use the chipset's Error Checking and Correction (ECC) feature, you must use a DIMM with 9 chips per side (standard 8 chips/side + 1 ECC chip). Memory speed setup is recommended through Configure SDRAM Timing by SPD (see 4.4.2 Advanced Chipset Setup). Install memory in any combination as follows: IMPORTANT: DIMMs must be inserted in the following sequence: DIMM1, DIMM2, DIMM3. That is, if you intend to initially use one DIMM, use DIMM1 first. Then when you are ready for a second DIMM, use DIMM2, and so on. If this sequence is not followed, system instability may be experienced. Location 168-pin DIMM Total Memory DIMM1 (Rows 0&1) SDRAM 16, 32, 64, 128, 256MB x1 DIMM2 (Rows 2&3) SDRAM 16, 32, 64, 128, 256MB x1 DIMM3 (Rows 4&5) SDRAM 16, 32, 64, 128, 256MB x1 Total System Memory (Max 768MB) = NOTE: At the time this User's Manual was written, 256MB DIMM's are only available as Double-Sided registered memory (128Mbit cells). 3.5.1 General DIMM Notes • When this motherboard operates at 100MHz, PC100-compliant modules must be used because of the strict timing issues involved under this speed. • This motherboard supports SPD (Serial Presence Detect) DIMMs. This is the memory of choice for best performance vs. stability. • SDRAM chips are generally thinner with higher pin density than EDO (Extended Data Output) chips. • BIOS shows SDRAM memory on bootup screen. • Single-sided DIMMs come in 16, 32, 64,128MB; double-sided come in 32, 64, 128, 256MB. 22 ASUS K7M User's Manual