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GA-686KX
SIMM module DRAM, and the DRAM speed must be 60 or 70 ns. The DRAM
memory system on mainboard consists of bank 0, 1 & bank 2. Each bank
consist of 2 PCs 72 pins SIMM module DRAM. Because the 72 pins SIMM
module is 32 bits width, using 2 PCs which can match a 64 bits system. The
total memory size is 8 - 768 MB.
The DRAM installation position refer to Figure 3.1, and notice the Pin 1 of
SIMM module must match with the Pin 1 of SIMM socket when the DRAM
SIMM module is installed. Insert the DRAM SIMM module into the SIMM
socket at 45 degree angle. If there is a wrong direction of Pin 1, the DRAM
SIMM module couldn't be inserted into socket completely.
After completely insert SIMM module into socket, then press the SIMM
module in vertical direction until the left and right metal holders can keep the
SIMM module standing up con-firmly.
3.5. CPU SPEED SETUP
The system's speed is fixed to 66.6MHz. The user can change the DIP
selection to set up the CPU speed for 233 -
SWITCH (S1)
366MHz processor. The CPU speed must match with the
frequency RATIO. It will cause system hanging up if the
frequency RATIO is higher than CPU's.
DIP SWITCH (S1)
1
2
3
4
OFF
ON
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
ON
OFF
ON
OFF
ON
OFF
OFF
ON
ON
OFF
ON
ON
ON
OFF
M
The CPU is a sensitive electric component and it can be easily
damaged by static electricity, so users must keep it away from
metal surface when the CPU is installed onto mainboard.
FREQ.
EXT.CLK.
INT.CLK.
RATIO
MHz
MHz
3
66
200
3.5
66
233
4
66
266
4.5
66
300
5
66
333
5.5
66
366
3-5
CPU Type
Pentium
II 200 MHz
Pentium
II 233 MHz
Pentium
II 266 MHz
Pentium
II 300 MHz
Pentium
II 333 MHz
Pentium
II 366 MHz
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