7
#1 #2 #3 #4
CPU
Bus
Clock
SDRAM
Clock
O
S
S
S
66.8 MHz
66.8 MHz
O
S
S
O
75 MHz
75 MHz
O
S
O
S
83.3 MHz
83 MHz
O
S
O
O
95 MHz
95 MHz
O
O
S
S
100 MHz
100 MHz
O
O
S
O
112 MHz
112 MHz
S
S
S
S
66.8 MHz
89 MHz *
S
S
S
O
83.3 MHz
66.8 MHz *
S
S
O
S
95 MHz
63.3 MHz *
S
S
O
O
100 MHz
66.6 MHz *
S
O
S
S
105 MHz
75 MHz *
S
O
S
O
112 MHz
74.4 MHz *
※
SDRAM Clock Asynchronous as CPU Bus frequency let user can use slow
speed SDRAM when CPU clock over 83MHz.
S : short (ON) O : open (OFF)
§
Table for CPU ratio selector : JP2
CPU ratio
BF0
BF1
BF2
1.5 X / 3.5 X
OFF
OFF
OFF
2.0 X
ON
OFF
OFF
2.5 X
ON
ON
OFF
3.0
X OFF ON OFF
4.0 X
ON
OFF
ON
4.5 X
ON
ON
ON
5.0 X
OFF
ON
ON
5.5 x
OFF
OFF
ON
Table for CPU Type selection :
SW1(Bus clock)
JP2 (clock ratio)
CPU Type
#1 #2 #3 #4 BF0
BF1
BF2
Bus clock Clock ratio
233MHz Pentium processor
with MMX technology
AMD K6-233
Cyrix 6X86 MII 300
O S S S O O O
66MHz
3.5X
200MHz Pentium processor
with MMX technology
AMD K6-200
Cyrix/IBM 6X86 MII 233
O S S S O S O
66MHz
3.0X
AMD K6/266
AMD K6-2/266
O S S S S O S
66MHz 4.0X
AMD K6/300
O S S S S S S
66MHz
4.5X
AMD K6-2/300
O O S S O S O
100MHz
3.0X
AMD K6-2/333
O S O O O O O
95MHz 3.5X
AMD K6-2/350
O O S S O O O
100MHz
3.5X
AMD K6-2/400,K6-3/400
O O S S S O S
100MHz
4.0X
AMD K6-2/450,K6-3/450
O O S S S S S
100MHz
4.5X
Cyrix 6X86MII-266
O S O S S S O
83MHz 2.5X
Cyrix 6X86MII-300
O S O S O O O
83MHz 3.5X
IDT Winchip-225
O S S O O S O
75MHz 3.0X
