User Guide

2-12 Chapter 2
1. IT5A CPU frequency setting (SW2)
The following tables will present the adjustment for the 586 CPU series.
Please setup the correct adjustment regarding the CPU type and brand.
Clock Chip:PLL52C66-08
External Clock AGP PCI DS6 DS7 DS8
6
0
M
H
z
6
0
M
H
z
3
0
M
H
z
O
N
O
N
O
N
6
6
.
6
M
H
z
6
6
.
6
M
H
z
3
3
.
3
M
H
z
O
N
O
N
O
F
F
6
8
M
H
6
8
.
4
M
H
3
4
.
2
M
H
O
N
O
F
F
O
N
7
5
M
H
z
6
0
M
H
z
3
0
M
H
z
O
F
F
O
N
O
N
8
3
.
3
M
H
z
6
6
.
6
M
H
z
3
3
.
3
M
H
z
O
F
F
O
N
O
F
F
1
0
0
M
H
z
6
6
.
6
M
H
z
3
3
.
3
M
H
z
O
F
F
O
F
F
O
F
F
Intel CPU
Intel
Pentium/with
MMX
External
Clock
Internal
Clock
External Clock
Factor
Reserve External Clock
Frequency
DS1 DS2 DS3 DS4 DS5 DS6 DS7 DS8
P100 66MHz 100MHz OFF OFF OFF OFF OFF ON ON OFF
P133 66MHz 133MHz ON OFF OFF OFF OFF ON ON OFF
P166 66MHz 166MHz ON ON OFF OFF OFF ON ON OFF
P200 66MHz 200MHz OFF ON OFF OFF OFF ON ON OFF
P233 66MHz 233MHz OFF OFF OFF OFF OFF ON ON OFF
AMD CPU
AMD-
K5/K6
External
Clock
Internal
Clock
External Clock
Factor
Reserve External Clock
Frequency
DS1 DS2 DS3 DS4 DS5 DS6 DS7 DS8
K5-PR100 66MHz 100MHz OFF OFF OFF OFF OFF ON ON OFF
K5-PR133 66MHz 100MHz ON OFF OFF OFF OFF ON ON OFF
K5-PR166 66MHz 117MHz ON ON OFF OFF OFF ON ON OFF
K6-166 66MHz 166MHz ON ON OFF OFF OFF ON ON OFF
K6-200 66MHz 200MHz OFF ON OFF OFF OFF ON ON OFF
K6-233 66MHz 233MHz OFF OFF OFF OFF OFF ON ON OFF
K6-266/3D 100MHz 266MHz ON ON OFF OFF OFF OFF OFF OFF
K6-300/3D 100MHz 300MHz OFF ON OFF OFF OFF OFF OFF OFF