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ASUS A7A266-E User’s Manual
3. HARDWARE SETUP
3.5 System Memory
This motherboard features two Double Data Rate (DDR) Dual Inline Memory Mod-
ule sockets and three Single Data Rate (SDR) Dual Inline Memory Module sockets.
3.5.1 DDR DIMM Support
The two DDR DIMM sockets support 2.5Volt (power level) unbuffered Double Data
Rate Synchronous Dynamic Random Access Memory (DDR SDRAM) of 64MB,
128MB, 256MB, 512MB, and 1GB to form a memory size between 64MB to 2GB.
One side (with memory chips) of the DIMM takes up one row on the motherboard.
DDR DIMMs support non-ECC modules that are available in unbuffered (typically
used in PCs) versions.
NOTE: The DDR memory bus runs at the same frequency as the CPU front side bus.
Install memory in any combination as follows:
DIMM Location 184-pin DDR DIMM Total Memory
Socket 1 (Rows 0&1) 64MB, 128MB, 256MB, 512MB, 1GB x1
Socket 2 (Rows 2&3) 64MB, 128MB, 256MB, 512MB, 1GB x1
Total System Memory (Max 2GB) =
3. H/W SETUP
System Memory
0101
A7A266-E
A7A266-E 184-Pin DDR DIMM Sockets
80 Pins
104 Pins
The 184-pin DIMM must be a 2.5V unbuffered DDR SDRAM. Each DDR DIMM
has a single notch slightly to the right of center:
IMPORTANT! DO NOT mix DDR and SDR SDRAMs. Mixing DDR and SDR
SDRAMs may damage the DDR modules!
WARNING! Be sure that the DIMMs you use can handle the specified SDRAM
MHz or else bootup will not be possible.