Abit ZM6 User Manual page 14

2-4
2-3. Installing System Memory
This motherboard provides three 168-pin DIMM sites for memory expansion. The DIMM
sockets support 1Mx64 (8MB), 2Mx64 (16MB), 4Mx64 (32MB), 8Mx64 (64MB), 16Mx64
(128MB), and 32Mx64 (256MB) or double sided DIMM modules. Minimum memory size
is 8MB and maximum memory size is 256MB SDRAM. There are three Memory module
sockets on the system board. (Total six banks)
In order to create a memory array, certain rules must be followed. The following set of rules
allows for optimum configurations.
l The memory array is 64 or 72 bits wide. (depending on with or without parity)
l Those modules can be populated in any order.
l Supports single and double density DIMMS.
Bank
Bank 0, 1
(DIMM1)
Bank 2, 3
(DIMM2)
Bank 2, 3
(DIMM3)
Total System Memory
Note: 1. When you install RAM modules, we strongly suggest that you install them in the
order of filling DIMM 1~ DIMM3. If you install RAM modules disregarded this
order, you may encounter some problems. One of problems might be that you can't
boot up the system. Another possible problem is that the BIOS won't be able to
detect the memory you installed.
Note 2. DIMM 3 control signals are shared with DIMM 2. Therefore, if you insert a double
sided RAM module into both DIMM 2 and DIMM 3 at the same time, two
situations will occur. One is when you use a PC-100 RAM (with an SPD chip on the
Ram module), you will not be able to boot up the system. The other situation is that
if you use a RAM module without SPD, you will only be able to get one RAM
module memory size used on your system. Therefore, we strongly suggest that you
do not insert a double sided RAM module in both DIMM 2 and DIMM 3. You
should only insert one doubled sided RAM module into DIMM2 or DIMM 3 at a
time, or you can install two single sided RAM modules into both DIMM 2 and
DIMM 3.
Table 2-1. Valid Memory Configurations
Memory Module
8MB, 16MB,
32MB, 64MB, 128MB, 256MB
8MB, 16MB,
32MB, 64MB, 128MB, 256MB
8MB, 16MB,
32MB, 64MB, 128MB, 256MB
Chapter2
Total Memory
8MB ~ 256MB
8MB ~ 256MB
8MB ~ 256MB
8MB ~ 256MB
ZM6