Abit KR7A, User Manual

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Chapter 2
KR7A/KR7A-RAID
2-6
2-3. Installing System Memory
This motherboard provides four 184-pin DDR DIMM sites for memory expansion. The DDR DIMM
sockets support 8Mx64 (64MB), 16Mx64 (128MB), 32Mx64 (256MB), 64Mx64 (512MB), and 128Mx64
(1024MB) or double density DDR DIMM modules. Minimum memory is 64 MB and the maximum
memory is 3 GB
(Unbuffered) or 4 GB (Registered) DDR SDRAM. There are four memory module
sockets on the system board (for a total of eight banks). In order to create a memory array, following rules
must be followed.
!
The memory array is 64 or 72 bits wide. (Depending on with or without parity)
!
For those modules, we suggest that you be populate DIMM1 to DIMM4 in order.
!
Supports single and double density DDR DIMMS.
Table 2-1. Valid Memory Configurations
Bank Memory Module Total Memory
Bank 0, 1
(DDR DIMM1)
64MB, 128MB, 256MB,
512MB, 1024MB
64MB ~ 1GB
Bank 2, 3
(DDR DIMM2)
64MB, 128MB, 256MB,
512MB, 1024MB
64MB ~ 1GB
Bank 4, 5
(DDR DIMM3)
64MB, 128MB, 256MB,
512MB, 1024MB
64MB ~ 1GB
Bank 6, 7
(DDR DIMM4)
64MB, 128MB, 256MB,
512MB, 1024MB
64MB ~ 1GB
Total System Memory for Unbuffered DDR DIMM
64MB ~ 3GB
Total System Memory for Registered DDR DIMM
64MB ~ 4GB
Generally, installing DDR SDRAM modules to your
motherboard is an easy thing to do. You can refer to
Figure 2-5 to see what a 184-pin PC1600 & PC2100
DDR SDRAM module looks like.
Unlike installing SIMMs, DIMMs may be “snapped”
directly into the socket. Note: Certain DDR DIMM
sockets have minor physical differences. If your
module doesn't seem to fit, please do not force it into the socket as you may damaged your memory
module or DDR DIMM socket.
The following procedure will show you how to install a DDR DIMM module into a DDR DIMM socket.
Step 1. Before you install the memory module, please place the computer power switch in the off
position and disconnect the AC power cord from your computer.
Step 2. Remove the computer’s chassis cover.
Step 3. Before touching any electronic components, make sure you first touch an unpainted, grounded
metal object to discharge any static electricity stored on your clothing or body.
Step 4.
Locate your computer’s 184-pin memory expansion DDR DIMM socket.