Step 3. Configure Memory
Your board comes with four DIMM sockets, providing support for up to 768MB of main
memory using DIMM modules from 8MB to 256MB. For 66MHz front side bus CPUs use
12ns or faster memory; for 100MHz front side bus CPUs use 8ns (100MHz, PC100
compliant) memory.
Memory Configuration Table
Number of
Memory Modules
DIMM 1 DIMM 2 DIMM 3
1 1
st
2 2
nd
1
st
3 3
rd
2
nd
1
st
RAM Type SDRAM
Memory Module
Size (MB)
8/16/32/64/128/256 Mbytes
Note:(1) 256 MB memory modules only available on PC registered DIMM.
(2) Always install memory modules in the order prescribed in this table.
(3) Do not install unbuffered and registered memory modules together.
Important:
It is of prime importance that you install DIMM modules as outlined in the table
above in order to preserve signal integrity on 100MHz front side bus systems.
Step 4. Set SW1 for AGP bus clock
SW1 is used to set the AGP bus clock frequency. The default setting for SW1 is open.
SW1 has to be closed by a jumper cap when you set the CPU Host (FSB) clock to 66, 68 or
75 MHz.
SW1
CPU FSB Clock AGP Clock
66 66
68 68
SW1
AGP Clock =
CPU FSB CLK
÷
1
75 75
83 55.3
100 66.6
103 68.6
112 74.6
SW1
AGP Clock =
CPU FSB CLK
÷
1.5
133 88.6
Note: The specification of maximum AGP bus clock frequency is 66.6MHz.
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