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3.6. CPU INSTALLATION AND JUMPERS SETUP
The system speed depends on the frequency of CLOCK GENERATOR. The user can
change SW selection to set up the system speed to 66 / 75 / 83 / 90 / 95 / 100MHz
for 3.3V/2.5V Pentium ® Processor (133 / 166 / 200 MHz) ;MMX(166 / 200 / 233
MHZ) , AMD K6-(166 / 200 / 233 / 266 / 300 ; K6-2(266 / 300 / 333 / 350 / 366 / 380
/ 400 / 450 / 475 / 500 / 550) ; K6-III(400 / 450 / 475 / 500 / 550) , Cyrix / IBM
6x86MX (PR166 / PR200 / PR233 / PR266 ) ; M¢ º - PR300 / PR333 / PR350 /
PR366 / PR400) ; IDT Winchip 2-(200 / 225 / 233 / 266 / 300) ; IDT Winchip 3-(266) ;
RISE MP6-(266).
The mainboard can use Pentium ® Processor, MMX , AMD-K6, AMD-K6-2, AMD-K6-
III Cyrix / IBM 6x86MX, Cyrix M¢ º , IDT Winchip 2 , IDT Winchip 3 , RISE MP6 CPU,
and the CPU speed must match with the frequency of CLOCK GEN. It will cause
system hanging up if the CLOCK GEN.'S frequency is faster than CPU's.
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.
M
When the user installs the CPU on socket, please notice that the PIN 1 of
CPU is in the same corner as the PIN 1 of socket!
M
Before the CPU is installed, the mainboard must be placed on a flat plane
in order to avoid being broken by the pressure of CPU installation.
SW: CPU INT./ EXT. FREQ. RATIO
O: ON
X: OFF
SW2
4
5
X
X
1.3V
X
O
1.4V
X
X
1.5V
X
O
1.6V
X
X
1.7V
X
O
1.8V
X
X
1.9V
X
O
2.0V
O
X
2.1V
X
O
2.2V
O
O
2.3V
6
7
8
SW2
X
X
O
2.5V
X
X
O
2.6V
O
X
O
2.7V
O
X
O
2.8V
X
O
O
2.9V
X
O
O
3.0V
O
O
O
3.1V
O
O
O
3.2V
X
X
X
3.3V
X
X
X
3.4V
X
X
X
3.5V
3-7
Hardware Installation
4
5
6
7
O
X
O
X
X
O
O
X
O
O
O
X
X
X
X
O
O
X
X
O
X
O
X
O
O
O
X
O
X
X
O
O
O
X
O
O
X
O
O
O
O
O
O
O
8
X
X
X
X
X
X
X
X
X
X
X
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