Shuttle HOT-555, User Manual

Page: 8 / 32

HOT-555 User's Manual 8
CPU Clock Speed Selection
HOT-555 mainboard features a clock generator to provide adjustable system
clock frequency. Jumpers JP27 and JP28 determine the system clock
frequency from 50MHz to 66MHz.
HOT-555 mainboard also provides Jumpers JP23 and JP24 to figure up
CPU core clock multiplier. By inserting or removing jumper caps on JP23
and JP24, the user can change the
Host Bus Clock / CPU Core Clock
ratio from 1 : 1.5 to 1 : 3.
CPU CLOCK SPEED J P 2 7 JP28
S Y S T E M
C L O C K
J P 2 3 J P 2 4
CPU Bus/Core
R A T I O
75 MHz
Pentium Processor
C L O S E C L O S E 50 MHz O P E N O P E N 1 : 1.5
90 MHz
Pentium Processor
C L O S E O P E N 60 MHz O P E N O P E N 1 : 1.5
100 MHz
Pentium Processor
O P E N C L O S E 66 MHz O P E N O P E N 1 : 1.5
120 MHz
Pentium Processor
C L O S E O P E N 60 MHz C L O S E O P E N 1 : 2
133 MHz
Pentium Processor
O P E N C L O S E 66 MHz C L O S E O P E N 1 : 2
150 MHz
Pentium Processor
C L O S E C L O S E 50 MHz O P E N C L O S E 1 : 3
180 MHz
Pentium Processor
C L O S E O P E N 60 MHz O P E N C L O S E 1 : 3
200 MHz
Pentium Processor
O P E N C L O S E 66 MHz O P E N C L O S E 1 : 3
125 MHz
Pentium Processor
C L O S E C L O S E 50 MHz C L O S E C L O S E 1 : 2.5
150 MHz
Pentium Processor
C L O S E O P E N 60 MHz C L O S E C L O S E 1 : 2.5
166 MHz
Pentium Processor
O P E N C L O S E 66 MHz C L O S E C L O S E 1 : 2.5
66 MHz
AMD5k86 - P75
O P E N C L O S E 66 MHz C L O S E O P E N 1 : 1
75 MHz
AMD5k86 - P75
C L O S E C L O S E 50 MHz O P E N O P E N 1 : 1.5
90 MHz
AMD5K86 - P90
C L O S E O P E N 60 MHz O P E N O P E N 1 : 1.5
100 MHz
AMD5k86 - P100
O P E N C L O S E 66 MHz O P E N O P E N 1 : 1.5
100 MHz
Cyrix 6x86 - P120+
C L O S E C L O S E 50 MHz
O P E N O P E N 1 : 2
110 MHz
Cyrix 6x86 - P133+
O P E N O P E N 55 MHz O P E N O P E N 1 : 2
120 MHz
Cyrix 6x86 - P150+
C L O S E O P E N 60 MHz O P E N O P E N 1 : 2
133 MHz
Cyrix 6x86 - P166+
O P E N C L O S E 66 MHz O P E N O P E N 1 : 2