Installing System Memory - Abit AT7 User Manual

2-6

2-3. Installing System Memory

This motherboard provides four 184-pin DDR DIMM sites for memory expansion. The DDR SDRAM
DIMM sockets support 8 M x 64 (64 MB), 16M x 64 (128 MB), 32 M x 64 (256 MB), 64 M x 64 (512
MB) and 128 M x 64 (1024 MB) or double density DDR SDRAM DIMM modules. Minimum memory is
64 MB and the maximum memory is 3 GB (Unbuffered, PC 1600 and PC 2100) / 2GB (Unbuffered,
PC 2700) or 3.5 GB (Registered, PC 1600 and PC 2100) / 3 GB (Registered, PC 2700) 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 DIMM4 to DIMM1 in order.
! Supports single and double density DDR DIMMs.
Bank
Bank 0, 1
(DDR DIMM1)
Bank 2, 3
(DDR DIMM2)
Bank 4, 5
(DDR DIMM3)
Bank 6, 7
(DDR DIMM4)
Total System Memory for Unbuffered DDR DIMM
Total System Memory for Registered DDR DIMM
Total System Memory for Unbuffered DDR DIMM
Total System Memory for Registered DDR DIMM
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.
AT7
Table 2-1. Valid Memory Configurations
Memory Module
64 MB, 128 MB, 256 MB,
512 MB, 1024 MB
64 MB, 128 MB, 256 MB,
512 MB, 1024 MB
64 MB, 128 MB, 256 MB,
512 MB, 1024 MB
64 MB, 128 MB, 256 MB,
512 MB, 1024 MB
(PC 1600/PC 2100)
(PC 1600/PC 2100)
(PC 2700)
(PC 2700)
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 PC 1600, PC 2100
and PC 2700 DDR SDRAM module looks like.
Unlike installing SIMMs, DIMMs may be
"snapped" directly into the socket. Note: Certain
Chapter 2
Total Memory
64 MB ~ 1 GB
64 MB ~ 1 GB
64 MB ~ 1 GB
64 MB ~ 1 GB
64 MB ~ 3 GB
64 MB ~ 3.5 GB
64 MB ~ 2 GB
64 MB ~ 3 GB